The SKB 3SKB-R910U28 28" Deep 10U Roto Shock Rack Case (Black) is a 28"-deep, ten-unit roto-molded shock rack that is made to fit Dell and Compaq deep servers. The case is ATA 300 category 1 rated. It has compound hinged doors, black powder-coated stainless steel latches, gasketed doors, a pressure relief valve and removable 4.0" casters. There are eight HM-245 elastomeric shocks. The case uses the ARCS (Adjustable Rail Conversion System) which allows the user to adjust the rack width up to 0.5" 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.