Specifications:1) Drive Bays: a) 5.25" x2(EXT) b) 3.5" X 1 (EXT) c) 3.5" X 2(INT)2) Mainboard: ATX MICORATX3) Expansion slots: 74) Optional front 1.0 USB and multimediaport5) Material: 0.5mm SECC 6) N.W: 5kg7) G.W: 5.5kgDimensions: 345x 180 x 418 (mm)Dimensions: 470 x 220 x 420(mm)Conveyance:Qty/20''FCL: 650pcsQty/40'' FCL: 1350pcsQty/40'' HQ: 1500pcs