StarTech.com 2U 20 to 30in Adjustable Mounting Depth Vented Sliding Rack Mount Shelf - 50lbs / 22.7kg - 24in Deep - Increase peripheral and equipment accessibility with this vented sliding cabinet shelf - Adjustable Mounting Depth (20 to 30in) Rack Mount Shelf - Rackmount Shelf - Sliding Rack Shelf - Server Rack Shelf - 50lbs / 22.7kg - 24in Deep