iStarUSA 4U Compact Stylish Rackmount Chassis with 500W Redundant Power Supply - Rack-mountable - Black - Aluminum Alloy, SECC, Zinc-coated Steel - 4U - 7 x Bay - 1 x 4.72" x Fan(s) Installed - 500 W - Power Supply Installed - ATX, Micro ATX Motherboard Supported - 2 x Fan(s) Supported - 4 x External 5.25" Bay - 1 x External 3.5" Bay - 2 x Internal 3.5" Bay - 7x Slot(s) - 2 x USB(s):