NavePoint Fixed Rack Vented Server Shelf 1U 19" 4 Post Rack Mount Adjustable from 17-33" Set of 3 Black Dimensions: 2"H x 17.5"W x 21.75"D 265 pound weight capacity Slotted venting Lip Color: Black Made of high quality cold-rolled steel with a powder coating Shelf can support up to 265lbs Maximum mounting depth of 33.5&#034; and a minimum mounting depth of 16.75&#034; Compatible with any 19&#034; enclosure 3 4-Post Adjustable Shelves M6 screws, cage nuts, washers