28mm height removable adapter (1 "approx.) That consists of two parts: the chassis or guides that attach to the housing and the removable drive that fits inside the frame as if it were a drawer. Compact design designed to be installed in housings of servers, where space is important, and especially in cases Rack 19 "to have such compartments. Accommodates hard drives Ultra 160/320 LVD SCA of 3.5 "with the hot-swap provision. Front black, with LED status indicators and on/off. Includes safety key and is made of aluminum for strength and dissipation heat. cordless design, where disk is attached directly to the connectors on the rear of the chassis. has SCSI-ID selector using micro-breakers. Size 185 x 126.5 x 28 mm. It also uses the same type of removable structure of U320/SCA/SCA2 SCSI Disk Array, which can be purchased to provide more removable drives (more cells) to swap discs (compatible with model #AR63).