Add a sturdy fixed shelf into almost any server rack or cabinet Compatible with StarTech.com RK2236BKF 2U Server Rack Shelf / Fixed Rack Mount Shelf 44.2lbs (20kg) Weight capacity 15.7in (400mm) Deep fixed shelf Universal rack shelf fits all standard 19in wide server racks or cabinets Sturdy cantilever shelf for storing networking devices KVM switches tools and other equipment in your server room or office