Arrives fully assembled and ready to go to work in your data center. UL® Listed. Offers versatile mounting with standard 19" M6 rails that work with most Black Box® Cabinet Accessories. Has two sets of adjustable rails provide even more versatility. Provides generous cable access. Makes cabinet baying easy with the optional Multicabinet Joining Kit. Provides 42U of rack space. Also available in 38.5"D versions in three heights. Also available in network models, which have a tempered glass front door.