Advantech 4U Compact Rackmount / Tower Chassis for EATX/ATX/MicroATX Motherboard - Tower/Rack-mountable - 4U - 4 x Bay - 3 x 3.15" x Fan(s) Installed - 1 x 700 W - Power Supply Installed - EATX, ATX, Mini ATX Motherboard Supported - 35.27 lb - 5 x Fan(s) Supported - 2 x External 5.25" Bay - 2 x Internal 2.5"/3.5" Bay(s) - 12x Slot(s) - 2 x USB(s):