200 Pound Capacity! Made to hold the heaviest of CPU's by mounting two separate pieces on each side of your 2-post rack. This shelf will fit all standard 19" EIA upright relay racks or cabinets. Both 10-32 and 12-24 mounting screw kits are included allowing mount on either thread pattern. The shelf occupies 2 Rack Spaces. The shelves are made from premium 16 gauge steel finished in a satin black industrial coating. Dimensions: 20" Depth x 19.25" Width x 4" Height