Rack Mount System for PCM200 UPC 765368451160 This is a fully packed RPK88. Note the wire management saddles and the various knockouts for wire access. The smaller round knockouts accommodated the power supply cords to the PCMCPU module. The RPK88 Rack Mount Kit is designed to flush mount the components of a PCM system.The RPK88 will hold up to ten modules in two assemblies.The RPK88 allows easy mounting of these modules in a standard 19-inch audio rack.The kit includes twelve wiring saddles, eight mounting brackets, and eight #6 x 1/4- screws."