Suitable for Server Chassis between 2U to 5U height Adjustable mounting depth for rear posts from 20" to 33.5" Load rating up to 77 lbs. Special design for easy chassis removal Users can use the server rail kit onto different server chassis including all Rosewill server cases (2600, 2700, 2800, 2850, 2900, 3100, 3200, 4000, 4100, 4200, 4412, 4500).