OSP SC12U-20SXS-AT 24 Space All-Terrain Side by Side Amp Rack The SC Series are our shockmount rack cases. 1" wall of heavy foam between the outer wall and the inner wall where the rack rails are mounted They also feature egg-crate foam insulation on both the front and back doors for added protection of your rack gear. 3/8" Plywood w/Black Laminate Tongue & Groove Metal Railing Ball Corners Industrial Rivets Industrial Latches Industrial Spring-Loaded Handles