NavePoint 2U 19-Inch Universal Vented Rack Mount Cantilever Server Cabinet Shelf 18-Inches Deep With Lip Set Of 2 Black Dimensions: 3.5"H x 17.5"W x 17.88"D 55 pound weight capacity Front mount design Slotted venting Lip Made of high quality cold-rolled steel with an electro-static powder coating Shelf can support up to 55lbs Front mount with slotted venting Compatible with any 19&#034; enclosure 2 2U Cantilever Shelves 10-32 screws 12-24 screws