Procraft 12U slanted equipment rack 16" deep at the bottom, 11-3/4" at the top, 3/4" birch plywood(light weight and very sturdy) with high quality, black automotive grade carpet. Procraft protective corners. Penn Elcom pre-tapped rack rail(for 10-32 machine screws). Free set of 12 rack screws and washers included! Rack rail is installed 1/2" from the front edge of the unit. Rabbeted joints screwed and glued for years of service. Overall dimensions are(including corners) 21-1/4" Wide, 25-1/2" Tall and 16-1/4" Deep. Inside dimensions are 19-1/8" Wide, 23-3/8" Tall and 12" Deep. This unit does not include front or rear covers.