NavePoint Adjustable Rack Mount Server Shelf Rails 1U Full Depth 4-Pack Dimensions: 1.75"H x 2.75"W x 20"D 110 pound weight capacity Depth can be adjusted up to 33.25" deep Non-vented No Lip Made of high quality cold-rolled steel with an electro-static powder coating Rails can support up to 110lbs Maximum mounting depth of 33.25&#034; and a minimum mounting depth of 16.13&#034; Compatible with any 19&#034; enclosure 4 Sets of Adjustable Rails 10-32 screws 12-24 screws