Increase peripheral and equipment accessibility with this vented sliding cabinet shelf Compatible with StarTech.com 4POSTRACKBK 2U Sliding Server Rack Shelf / Vented Rack Mount Shelf 50 lbs. (22.7kg) Weight capacity 24in (610mm) Deep sliding shelf Mounting depth adjustable from 20.1-29.3in (510-744mm) Universal rack shelf fits standard 19in wide server racks or cabinets Sliding shelf for storing networking devices KVM switches tools and other equipment in your server room or office