Heavy Duty Equipment Shelf for 6" Channel; 19"W x 7.16"H x 20"D; Black; Double Sided; Non-Vented This shelf was added as a result of requests from users of CPI's popular CatRack Deluxe Units. The shelf holds heavy equipment such as laser printers, large CPUs, power supplies, etc. Holds equipment up to 17”W x 20”D. Mounting hardware not included.