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Black clamp-on desk shelf 21.7 by 9.8 inches steel and particle board platform with adjustable height clamp

VIVO

VIVO Black 22" Clamp-on Desk Extension Shelf

SKU CH-C4X6-0HANX

A 21.7" × 9.8" steel shelf clamps to desks up to 2.8" thick, holds 44 lbs, and works as a desk extension, monitor riser or freestanding platform

  • Clamps to desks up to 2.8" thick with simple hand tightening
  • Holds up to 44 lbs on a 21.7" x 9.8" steel and particle board platform
  • Height adjustable clamp provides 2.5" to 4.2" clearance for monitor or laptop riser use
  • Three mounting orientations: inward, outward, or freestanding at 6.5" height
  • Moves with sit-to-stand desks keeping accessories accessible at any height

Compact 22-inch desk shelf

The VIVO Black 22-inch clamp-on shelf adds 21.7 by 9.8 inches of usable surface to any desk up to 2.8 inches thick. It supports monitors, laptops, printers or gaming gear up to 44 lbs. Three mounting modes let it face inward, outward or stand freely on the desktop.

Thermals, noise and power

No fans, motors or electronics are present, so the shelf produces no heat and no audible noise. It draws zero power and adds no thermal load to the workspace. The steel and particle-board construction remains passive in all configurations.

Build integration

The clamp base needs 5.2 inches of clearance under the desk edge and adjusts 1.7 inches in height. Shelf height above the desktop ranges from 2.5 to 4.2 inches when clamped. Freestanding mode sits 6.5 inches high on 9.8-inch feet. The low 0.5-inch tray profile keeps items stable without blocking monitor sight-lines.

Highlights

  • Clamps to desks up to 2.8" thick with simple hand tightening
  • Holds up to 44 lbs on a 21.7" x 9.8" steel and particle board platform
  • Height adjustable clamp provides 2.5" to 4.2" clearance for monitor or laptop riser use
  • Three mounting orientations: inward, outward, or freestanding at 6.5" height
  • Moves with sit-to-stand desks keeping accessories accessible at any height

Specifications

BrandVIVO

Questions about this item

How do I clamp the 21.7 x 9.8 shelf to a desk up to 2.8 thick, and what step do people miss?

Position the clamp base so the 5.2 under-desk feet clear the desktop, then hand-tighten both bolts evenly until the shelf height from the desktop sits between 2.5 and 4.2; the step often missed is checking that the 1.7 total clamp-height adjustment is centred before final tightening.

What maintenance or replacement will the steel, particle-board and plastic shelf need over time?

Periodically re-tighten the clamp bolts and inspect the particle-board tray for sag or moisture damage; if the tray warps or the plastic clamp pads crack, replace the affected panel or pads rather than the whole unit.

What limit appears first when the shelf carries a sustained 44 lb load on a sit-stand desk?

The 1.7 total clamp-height adjustment range is the first constraint; as the desk cycles between sitting and standing heights, the clamp can reach its travel limit and lose grip before the 44 lb steel frame yields.

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