The SKB 3SKB-R906U28 6U Shock Rack (Black) is a 28" deep roto-molded shock rack which should be an instant success with all companies utilizing the deeper servers such as the new Dell and Compaq. Nobody else manufactures a rotationally molded shock rack that is 28" deep and that fits inside the center portion of the case. The 28 inch Heavy Duty Shockrack systems include a revolutionary new patent pending Adjustable Rail Conversion System. This ARCS technology allows the user to adjust the rack width up to 0.5 inches on each side and optional easy-mount adapter rails will convert the equipment mounting standard from 3/16" threaded to 7/32" through holes or square cage nut windows. The 7/32" through hole option and the 3/16" threaded are special order items. Accommodates Dell and Compaq servers utilizing "Versa-rail" or "Rapid-rail" pull-out systems.