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A hundred and ten kilograms on four posts, with the hardware counted out

Tecmojo 19-inch 1U four-post shelf, 550 mm deep, adjustable 343 mm upwards, 110 kg

The only four-post shelf in this hub, and the only one that carries three figures instead of one: 110 kilograms, an adjustable depth, and a hardware list counted item by item.

Tecmojo black vented 19-inch 1U four-post rack shelf with adjustable rear brackets

Tecmojo 19-inch 1U four-post shelf, 550 mm deep, adjustable 343 mm upwards, 110 kg

The only four-post shelf in this hub, and the only one that carries three figures instead of one: 110 kilograms, an adjustable depth, and a hardware list counted item by item.

Rack units
One — stated in the title and in the first bullet, which describes a 1U four-post server rack tray for 19-inch racks and cabinets
Mounting depth
Adjustable — the title gives a shelf depth of 550 mm and a variable mounting depth from 343 mm to 800 mm, while the first bullet gives the same range as 34.3 cm to 80.8 cm. The lower figure agrees; the upper differs between the two, and neither is withdrawn
Cantilever or four-post support
Four-post — stated in the first bullet, which calls it a 1U four-post server rack tray designed for 19-inch racks and cabinets with an adjustable mounting depth. It is the only listing on this shelf to name the arrangement in those words
Stated load rating
Up to 110 kg — stated in the title and in the second bullet, which names industrial-grade SPCC cold-rolled steel and gives tower servers, uninterruptible power supplies, NAS units and amplifiers as the equipment it has in mind. It is five times the next highest figure on this shelf
Vented or solid surface
Vented — stated in the title as a rack tray with ventilation openings, and in the third bullet, which credits the vented design with constant air circulation and effective heat dissipation
Sliding or fixed
Fixed — stated in the title as a shelf for fixed installation, and in the second bullet, which calls it a fixed rack tray
Usable surface dimensions
Not published on the listing — the title gives the shelf as 550 mm deep and no width or surface figure appears in any bullet
Fixings supplied
Sixteen M6 bolts, eight M6 cage nuts, eight flange nuts, two non-slip stoppers and two hook-and-loop cable ties — listed item by item in the fourth bullet, the only counted hardware list on this shelf
Amazon reference
B0GDPBJ17V (same reference on 6 Amazon marketplaces)
EAN
5061116020448
  • A hundred and ten kilograms on four posts, five times anything else on this shelf
  • The hardware is listed piece by piece, down to two non-slip stoppers
  • The upper depth figure is 800 mm in the title and 80.8 cm in the first bullet

Best for: A deep cabinet holding something genuinely heavy — a tower server, an uninterruptible power supply, a stack of drives — where front-only support would not do.

≈ 40 €
Check price on Amazon

Specifications

Rack units
One — stated in the title and in the first bullet, which describes a 1U four-post server rack tray for 19-inch racks and cabinets
Mounting depth
Adjustable — the title gives a shelf depth of 550 mm and a variable mounting depth from 343 mm to 800 mm, while the first bullet gives the same range as 34.3 cm to 80.8 cm. The lower figure agrees; the upper differs between the two, and neither is withdrawn
Cantilever or four-post support
Four-post — stated in the first bullet, which calls it a 1U four-post server rack tray designed for 19-inch racks and cabinets with an adjustable mounting depth. It is the only listing on this shelf to name the arrangement in those words
Stated load rating
Up to 110 kg — stated in the title and in the second bullet, which names industrial-grade SPCC cold-rolled steel and gives tower servers, uninterruptible power supplies, NAS units and amplifiers as the equipment it has in mind. It is five times the next highest figure on this shelf
Vented or solid surface
Vented — stated in the title as a rack tray with ventilation openings, and in the third bullet, which credits the vented design with constant air circulation and effective heat dissipation
Sliding or fixed
Fixed — stated in the title as a shelf for fixed installation, and in the second bullet, which calls it a fixed rack tray
Usable surface dimensions
Not published on the listing — the title gives the shelf as 550 mm deep and no width or surface figure appears in any bullet
Fixings supplied
Sixteen M6 bolts, eight M6 cage nuts, eight flange nuts, two non-slip stoppers and two hook-and-loop cable ties — listed item by item in the fourth bullet, the only counted hardware list on this shelf
Amazon reference
B0GDPBJ17V (same reference on 6 Amazon marketplaces)
EAN
5061116020448

On the listing

A 1U four-post server rack tray for 19-inch racks and cabinets, 550 mm deep, with an adjustable mounting depth given as 343 mm to 800 mm in the title and as 34.3 cm to 80.8 cm in the first bullet; a fixed tray in industrial-grade SPCC cold-rolled steel carrying up to 110 kg, offered for heavy IT equipment such as tower servers, uninterruptible power supplies, NAS units and amplifiers; a vented design for constant air circulation and effective heat dissipation; an accessory list of sixteen M6 bolts, eight M6 cage nuts, eight flange nuts, two non-slip stoppers and two hook-and-loop cable ties; and an installation described as easy with a manual or a video for reference.

A hundred and ten kilograms, and where they go

This is the only shelf in this hub bolted at both ends, and the load rating shows exactly what that is worth.

The front-fixed trays on this shelf state about 15 kg, about 16 kg, 20 kg and 25 kg. The sliding one states 5. This one states 110.

The steel is not five times better. The difference is that a cantilever shelf carries everything as an overhang from two rails at one end, and a four-post shelf is held front and rear so that the load sits between its supports instead of hanging off them.

The second bullet names what it has in mind and the list is unlike anything else on this shelf: tower servers, uninterruptible power supplies, NAS units, amplifiers. Those are the objects that break a cantilever tray, and they are the reason this one exists.

The rear rails it assumes

Which brings the requirement that the page never states.

A four-post shelf needs something to bolt to at the back. On the cabinets hub of this site exactly one of the seven listings publishes a rail count — four rails — and the other six describe rails without saying how many or where.

So the compatibility question here is not the shelf’s depth but the cabinet’s construction, and it has to be settled before the order. A four-post shelf in a two-rail cabinet is a cantilever shelf with two spare brackets, and it is not rated for 110 kg in that condition.

Sixteen bolts, eight cage nuts, eight flange nuts

The fourth bullet counts the hardware out, and no other listing on this shelf does.

That is not a trivial courtesy. Rack fixings are the parts that run out at the wrong moment, and a shelf arriving with sixteen M6 bolts and eight cage nuts is a shelf that can be fitted the evening it arrives. Two of the seven shelves here list no hardware at all, and one lists cage nuts without bolts.

The two non-slip stoppers are the small surprise: something to keep equipment from creeping forward on a smooth tray, which nobody else in this hub supplies.

Two figures for one depth

The title says the mounting depth varies from 343 mm to 800 mm. The first bullet says 34.3 cm to 80.8 cm.

The lower ends agree exactly. The upper ends differ by eight millimetres, and the listing offers nothing that reconciles them. Both are reported here because both are printed.

For a buyer using this shelf in any of the cabinets on this site the point is academic, since the deepest of those is 450 mm. On a full-depth floor rack near the top of the range, it is worth a question.

Before ordering

Confirm the cabinet has rear rails and find out where they sit, because that is what the 110 kg depends on. Check the front-to-rear rail distance against 343 mm at the shallow end. And note that no width is published, so the object going on it should be measured against the cabinet rather than against this page.

Availability

Priced from 40 € to 45 € across the German, French, Italian and Spanish Amazon stores the day this page was checked.

In the American and British Amazon catalogues with no live offer against it: the reference exists, nobody is filling it.

Every figure in this section is what Keepa held on the day this page was last updated. Stock and prices move without warning.

Prices quoted in this text were read on 10 September 2026. The live price is at the top of the page.

More rack shelves

  • DIGITUS black perforated 19-inch 1U rack shelf with front mounting flanges

    DIGITUS 19-inch 1U fixed shelf, 250 mm deep, 441 × 250 mm usable, 15 kg

    The cheapest shelf in this hub and one of only two that separate the usable surface from the outer dimension, with its screws, cage nuts and washers all listed in the delivery.

    Rack units
    One — stated in the title and in the second bullet, which says the shelf needs only a single rack unit
    Mounting depth
    250 mm — stated in the title and in the first bullet. The second adds that the shelf fits DIGITUS 19-inch network cabinets from a depth of 450 mm upwards, which is a requirement on the cabinet rather than a dimension of the shelf
    Cantilever or four-post support
    Not published on the listing — the second bullet says the shelf is fixed to the 19-inch profile rails of the network cabinet and does not say whether that means the front rails alone or front and rear. No post count appears anywhere
    Stated load rating
    Up to 15 kg — stated in the fifth bullet, alongside a construction of high-grade steel sheet. It is the lowest load on this shelf apart from the sliding one
    Vented or solid surface
    Vented — the fourth bullet describes the perforation of the shelf as allowing unhindered air circulation in the cabinet and contributing to the cooling of the equipment
    Sliding or fixed
    Fixed — stated in the title as a shelf for fixed installation, and in the second bullet, which describes it bolted to the profile rails
    Usable surface dimensions
    441 × 250 mm in width and depth — stated in the first bullet as the surface inside the shelf, against outer dimensions of 482 × 250 mm. Two of the seven shelves here separate those two figures and this is one of them
    Fixings supplied
    Screws, cage nuts and washers — stated in the fifth bullet as included in the delivery. It is the fullest fixing list on this shelf
    Amazon reference
    DE B002KTE870 · US B07CNGDN63 · GB B07CNGDN63 · FR B07CNGDN63 · IT B07CNGDN63 · ES B07CNGDN63
    EAN
    4016032185772
    • Separates the usable surface from the outer dimension, which five of the seven shelves here never do
    • Screws, cage nuts and washers all listed, so nothing else has to be ordered
    • Fifteen kilograms, the lowest fixed-shelf rating on this shelf

    Best for: A router or a mini-PC standing in a deep cabinet, where the shelf is a platform rather than a load-bearing part.

    ≈ 13 €
    Check price on Amazon
  • HB-DIGITAL black 19-inch 1U rack shelf with raised edges

    HB-DIGITAL 19-inch 1U shelf, 270 mm deep, 480 × 265 mm usable, no load figure published

    One of only two shelves here to publish a usable surface — 480 by 265 millimetres — and the only one that calls itself heavy-duty in the title and then never says what it carries.

    Rack units
    One — stated in the title and in the third bullet, which says the 1U shelf maximises the available space and improves air circulation
    Mounting depth
    270 mm — stated in the title
    Cantilever or four-post support
    Not published on the listing — the second bullet claims universal compatibility with 19-inch rack frames and a quick installation without special tools, and no bullet says whether the shelf is carried at the front alone or at both ends
    Stated load rating
    Not published on the listing — no weight figure appears anywhere. The title calls the shelf heavy-duty steel sheet and the first bullet describes a robust construction giving a stable and secure platform, without naming a load. Six of the seven shelves here publish a figure
    Vented or solid surface
    Not published on the listing — no perforation and no vent is named. The third bullet credits the shelf with improving air circulation without saying how, and the fourth describes the usable dimensions rather than the surface
    Sliding or fixed
    Not published on the listing — no bullet says whether the shelf bolts in place or runs on slides. The second describes a quick installation and the fifth a solid steel construction with a black coating
    Usable surface dimensions
    480 mm usable width and 265 mm usable depth — stated in the fourth bullet, which offers the shelf for network hardware and audio-visual equipment alike. Two of the seven shelves here publish a usable figure and this is one of them
    Fixings supplied
    Not published on the listing — no screws, cage nuts or washers are listed. The second bullet says the installation is quick and needs no special tool, which describes the effort rather than the contents
    Amazon reference
    B0DDTGFMGM (same reference on 6 Amazon marketplaces)
    EAN
    4063328058241
    • Publishes a usable width and a usable depth, which five of the seven shelves here never do
    • Two hundred and seventy millimetres of depth, more than the two cheaper shelves offer
    • Called heavy-duty in the title with no load figure anywhere on the page

    Best for: A cabinet where the shelf has to be measured before it is bought, and the weight going on it is modest and already known.

    ≈ 18 €
    Check price on Amazon
  • Koscom Connect black perforated 19-inch 1U pull-out rack shelf

    KOSCOM CONNECT 19-inch 1U sliding shelf, 483 × 350 × 45 mm, rails adjustable 350–505 mm, 5 kg

    A tray that comes out of the cabinet instead of staying in it, which is the whole argument for it — and a five-kilogram limit, which is the price of the mechanism.

    Rack units
    One — stated in the fourth bullet, which gives the dimensions as 48.3 × 35 × 4.5 cm for a 1U pull-out tray
    Mounting depth
    For cabinets from 450 mm depth — stated in the first and fourth bullets, the latter giving the range as 450 mm up to 600 mm. The third adds that the spacing of the profile rails is adjustable in depth from 35 to 50.5 cm
    Cantilever or four-post support
    Not published on the listing — the third bullet says the tray installs on the profile rails of the rack with an adjustable rail spacing, and no bullet names a post count or says whether the rear is carried
    Stated load rating
    Maximum 5 kg — stated in the second bullet. It is by a wide margin the lowest figure on this shelf, where the fixed trays run from about 15 kg to 110 kg
    Vented or solid surface
    Vented — the second bullet describes high-grade perforated sheet, stable and able to withstand high loads while allowing passive cooling
    Sliding or fixed
    Sliding — stated in the title and in the first bullet as a pull-out tray, offered for components that cannot be rack-mounted and for easier access. It is the only sliding shelf in this hub
    Usable surface dimensions
    Not published on the listing — the fourth bullet gives 48.3 × 35 × 4.5 cm as the dimensions of the tray, which are outer figures. No separate surface measurement appears
    Fixings supplied
    Not published on the listing — no screws, cage nuts or washers are listed. The third bullet says the tray installs easily on the profile rails and names no hardware
    Amazon reference
    B0D96B839H (same reference on 6 Amazon marketplaces)
    EAN
    4043089462211
    • The only shelf in this hub that pulls out, which is the difference between reading a label and moving a cabinet
    • The rail spacing adjusts across 155 mm, from 350 to 505 mm
    • Five kilograms, a third of the 15 kg a fixed tray here carries

    Best for: A cabinet holding something that has to be reached rather than merely stored — a small drive, a console, a labelled patch record.

    ≈ £45 / 35 €
    Check price on Amazon

Others worth having spare

  • 10Gtek 10GBASE-T copper SFP+ module with an RJ45 socket and a metal shell

    10Gtek 10GBASE-T copper SFP+, 30 m stated, Marvell AQR113C named, 2.5 W draw

    The copper module that tells you what it costs in watts and where it gets too warm, and then prints ten maker names it will not work with — the only listing on this shelf that spends a bullet on its own limits.

    Module form factor
    SFP+ — stated in the title, and the first bullet asks that the transceiver be used in a 10G SFP+ port rather than a gigabit one
    Module rate
    10 Gb/s — stated in the first bullet as the data rate, and carried by the 10GBase-T designation in the title
    Optical or copper medium
    Copper — stated in the title, which calls it a copper transceiver with an RJ45 socket
    Fibre type
    Not published on the listing, and a copper module has no fibre to qualify. The second bullet names the cable instead: CAT.6a or CAT7 RJ45 cable, quoted in the same line as the reach
    Stated reach
    Up to 30 m — stated in the title and in the second bullet, in both cases against the Cat 6a or Cat 7 cable named beside it
    Connector type
    RJ45 — stated in the title as the socket the module presents
    Wavelength
    Not published on the listing, and copper carries none. The fifth bullet names the Marvell AQR113C PHY controller in its place and calls it the latest of its kind
    Vendor coding stated
    Compatibility is claimed for Cisco, Meraki, Ubiquiti except the US-48-500W, Mikrotik, Netgear, Zyxel, QNAP NAS, Synology, D-Link, TP-Link, Supermicro and other open switches. The fourth bullet then names ten makers it is not compatible with: HP-ProCurve, HP-H3C, HP-Aruba, Intel, Arista, Mellanox, Dell Force10, Extreme, Brocade and Juniper
    Operating temperature range
    Not published on the listing as a range — the fifth bullet states instead that the module can become hot in use because the integrated circuit draws 2.5 W, and recommends using it where the ambient temperature stays below 50 °C
    Amazon reference
    B01M8O3MAL (same reference on 6 Amazon marketplaces)
    EAN
    0603149410633
    • The only listing here that publishes what the module draws, and says what that means in practice
    • Ten makers are named as incompatible, which is worth more than any list of the compatible ones
    • The thermal statement is an ambient recommendation, not the working range a datasheet would carry

    Best for: A ten-gigabit copper link in a cabinet with air actually moving through it, into a switch outside the ten makers this listing rules out.

    ≈ £31 / 36 €
    Check price on Amazon
  • Elfcam pair of bidirectional 10G SFP+ transceivers with single SC optical ports

    Elfcam matched pair of bidirectional 10G SFP+, SC simplex, OS2, 20 km stated

    The dearest listing on this shelf and the only one that ships a complete link: two bidirectional modules with their wavelengths already reversed, on SC connectors where everything else here uses LC or RJ45.

    Module form factor
    SFP+ — stated in the title, supplied as one pair of two modules rather than as a single transceiver
    Module rate
    10 Gbps, 2.5 Gbps and 1.25 Gbps — three rates stated in the second bullet, with 10 Gb, 2,5 Gb and 1,25 Gb also named in the title
    Optical or copper medium
    Optical — the first and second bullets name a single-mode simplex SC fibre port of 9/125 µm
    Fibre type
    Single-mode, 9/125 µm — stated in the title and again in the first, second and fourth bullets. The grade is given as OS2 in the title and in the first and fourth bullets, which makes this one of only two optical modules on this shelf to name a grade at all
    Stated reach
    Up to 20 km — given in the first bullet as 20 KM and in the fourth as a transmission distance of up to 20 km with a single-mode simplex 9/125 µm OS2 SC cable
    Connector type
    SC simplex — stated in the title and in the first bullet. It is the only SC module on this shelf; the other six take LC or RJ45
    Wavelength
    TX 1270 nm with RX 1330 nm on one module and TX 1330 nm with RX 1270 nm on the other — stated in the first and second bullets. That reversal is what makes the pair a pair, and it is the reason the two modules are not interchangeable with each other
    Vendor coding stated
    Coded for Cisco SFP-10G-BXD-I and SFP-10G-BXU-I — the downstream and upstream halves named separately — with Ubiquiti Networks UF-SM-10G-S, Huawei, D-Link, Ruijie and open switches added in the third bullet, which prints Huawei twice
    Operating temperature range
    Not published on the listing — no range appears in any bullet. The fifth offers a warranty and a repair service centre in Paris in its place, and the sentence that should give the warranty length has no number in it: it reads as a warranty period of years, with the figure missing
    Amazon reference
    B0DBLFC335 (same reference on 6 Amazon marketplaces)
    EAN
    3701528726041
    • Two modules with the wavelengths already reversed, so a single-strand link is complete in one order
    • Names both halves of the Cisco bidirectional pair, downstream and upstream, by part number
    • The warranty sentence has a blank where its number should be

    Best for: A 20 km single-strand run on SC-terminated single-mode fibre, bought once with both ends of the link in the same box.

    ≈ $66 / £60 / 60 €
    Check price on Amazon
  • GIQITCK 10GBASE-T copper SFP+ transceiver with an RJ45 socket

    GIQITCK 10GBASE-T copper SFP+ to RJ45, 30 m stated, Realtek controller named

    The cheaper of the two copper ten-gigabit modules here, sold with an unusually specific compatibility bullet that excludes two Cisco series by name and a cable requirement stated twice in two incompatible ways.

    Module form factor
    SFP+, called a mini-GBIC in the title — the ten-gigabit cage. The third bullet says it belongs in a 10Gb SFP+ port and names fibre switches, routers, network cards and servers as its hosts
    Module rate
    10 Gbps — stated in the title as 10GBASE-T and in the second bullet, which says the module supports a 10 Gbps rate
    Optical or copper medium
    Copper — stated in the title and in the second bullet, which calls it a 10G copper module with a copper RJ-45 plug
    Fibre type
    Not published on the listing, and a copper module has no fibre to qualify. What the second bullet names in its place is the cable, and it names it twice: Cat 6A, Cat 7 or Cat 8 in one sentence, then Cat 5e or better in the next. Both statements are printed, neither is withdrawn
    Stated reach
    Up to 30 m — stated in the title. No shorter distance is quoted against a lesser cable, which is what would normally reconcile the two cable statements
    Connector type
    RJ45 — stated in the title and in the second bullet as a copper RJ-45 plug
    Wavelength
    Not published on the listing, and copper has none. The nearest the page comes is the first bullet, which names a Realtek controller as the newest chip and credits it with a performance improvement
    Vendor coding stated
    Coded for Cisco SFP-10G-T-S, with the Cisco Nexus and Cisco Meraki series excluded by name in the same bullet; also named are Ubiquiti UF-RJ45-10G, Ubiquiti Networks, Netgear AXM765, DEM-440XT, Mikrotik, Supermicro and other open switches
    Operating temperature range
    Not published on the listing — no working range appears in any bullet. The fifth says instead that every module was checked one after another on various switches before shipping, and the sixth offers a thirty-day return, a two-year warranty and lifetime technical support
    Amazon reference
    B0DLG7WG35 (same reference on 6 Amazon marketplaces)
    EAN
    0717325593611
    • Names two switch series it will not work in, which no other listing on this shelf does
    • Quotes Cisco, Ubiquiti and Netgear part numbers rather than brand names alone
    • Two different cable requirements sit one sentence apart and neither is withdrawn

    Best for: A ten-gigabit copper run of up to 30 m into a switch on the named list, and specifically not into a Nexus or a Meraki.

    ≈ $25 / 28 €
    Check price on Amazon

All rack shelves