Add a 1U Compact Storage Shelf to any Standard 19 in Server Rack or Cabinet Compatible with StarTech.com RK812WALLOA 1U Server Rack Shelf / Fixed Rack Mount Shelf 33.2 lbs. (15 kg) Weight capacity 7 in (177 mm) Deep fixed shelf Universal rack shelf fits all standard 19 in wide server racks or cabinets Sturdy cantilever shelf for storing networking devices KVM switches tools and other equipment in your server room or office