Add a sturdy vented shelf into almost any server rack or cabinet Compatible with StarTech.com RK2236BKF 2U Server Rack Shelf / Fixed Vented Rack Shelf / Rack Mount Shelf 50 lbs. (22kg) Weight capacity 16in (406mm) Deep fixed shelf Universal rack shelf fits all standard 19in wide server racks or cabinets Cantilever shelf for storing networking devices KVM switches tools and other equipment in your server room or office