Advantech 3U Short-depth Rackmount/ Tower Chassis for EATX/ATX/MicroATX Motherboard - Tower/Rack-mountable - 3U - 5 x Bay - 3 x 3.15", 2.36" x Fan(s) Installed - 0 - EATX, ATX, Micro ATX Motherboard Supported - 26.46 lb - 1 x External 5.25" Bay - 2 x Internal 3.5" Bay - 2 x External 2.5"/3.5" Bay(s) - 7x Slot(s) - 2 x USB(s):