The WMA Series wall cabinets are 16- gauge, welded with 18" deep center-section and adjustable mounting rails, and a 4-1/2" deep rear section. Panel space openings range from 10 RU to 35 RU. Cabinets are equipped with provisions for custom cabinet mounting, wire management, equipment mounting, and structural support.Cabinets are finished in a black electrostatic powder coat.All models include adjustable front rack rails tapped 10-32, and manufactured to standard E.I.A. 1/2" spacing. Hat channels provide adjustable rack rail support with securing holes for fixed positioning of rails. Top and Bottom removable 3RU panels are located in the center section of the cabinet for EFP Series fan panels for further ventilation or for isolation panels for power.