Norco Rackmount Chassis Components RPC-2304 2U rack mount design, meets EIARS-310C standard. Super short depth, only 15.25 inch Support Micro-ATX (9.6"x9.6"), ITX (6.7" x 6.7") motherboard Two front USB ports Three optional 40mm rear fans Smooth border prevent lacerating your skin Drive Bay: Supports four hot swappable 3.5" or 2.5" drives Indicator: Power ON/OFF x 1, HDD x 1, NETWORK X 2\