Add a high capacity adjustable mount depth fixed shelf into almost any server rack or cabinet Compatible with StarTech.com 4POSTRACKBK 1U Server Rack Shelf / Adjustable Rack Mount Shelf 175 lbs. (80kg) Weight capacity 27.6in (700mm) deep shelf Mounting depth adjustable from 19.5-38.3in (495-974mm) Universal rack shelf fits all standard 19in wide server racks or cabinets Heavy-duty shelf for storing networking devices KVM switches tools and equipment in your server room or office