The 4-Post rack combines the stability of a cabinet with the accessibility of an open rack to deliver maximum flexibility. The 45 RU rack is 23 inches wide overall (with 19 inch standard EIA mount) and 30 inches deep, with adjustable mounting rails that have #12-24 EIA universal mounting hole spacing, and printed numbering. A range of cable managers and accessories work with the rack. The rack is UL listed for 2,500 pounds and is made of welded steel. The rack is black.