SKB 3RR 9U20 22B 9 Unit 20" Deep RR Series Shock Rack 20 inch Black led tubes Dominate the dance floor and H DIGI XQ7WWS Dominate the dance floor and set the stage ablaze with the DAS Audio DJ Package your ultimate weapon for sonic excellence and unforgettable moments Choose the one that sounds best for DJing or producing music in your home or studio The interior of the case features a removable rack with a patent pending "positive lock" latching system that slides open like a file drawer The 20" 3RR Series Removable Racks are 20" deep from rail to rail with a standard 19" rack width per ANSI EIA 310 C specification and feature square hole rack rails to accommodate either #10 32 US standard or 6mm International standard cage nuts which are supplied with the cases