NavePoint 1U Adjustable 4-Post Rack Mount Server Shelf Rails Full Depth Set Black 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 1 Set of Adjustable Rails 10-32 screws 12-24 screws