19" - 3U Industrial Rack-Mount Storage Chassis Features: 2U / 3U Rack-Mount Storage Chassis meets EIA RS310C Industrial standard and FCC/CE requirements . Rugged construction and design for harsh industrial environment . SCSI-1/SCSI-2/Wide SCSI/ Ultra Wide/Ultra2 Wide interfaces are available . Shock resistant drive bracket exposed " (2x) open 5.25" , (3x) 3.5" hidden drive bay . 1 x 8cm ball bearing Fans with removable Air filter to have better ventilation and easy replacing . AT 300W industrial grade power supply w/safety-approved . Excellent mechanical designed for best shock-proof , dust-proof , water-proof and air-tight . Model No. MP-S2HA (2U) MP-S3HA (3U) Drive Space 5.25" Half-height 2 4 3.5" Open     3.5" H.D.D. (Hidden) 3 2 Interface SCSI-1 / SCSI-2 / SCSI-3 / Ultra II SCSI Internal Cable IDC (50/68) x 5 IDC (50/68) x 6 ID Switch 5 6 Cooling Fan 8 cm Fan 1 1 12 cm Fan     Power Supply (optional) PS/II AT 300W Redundant ATX   Safety   UL , CSA , TUV Dimension (W. x D. x H.) mm 482.6x500.0x88.5 482.6x500.0x132.75 Inch 19.0x19.69x3.49 19.0x19.69x5.23 Packing 1pce/1CTN N.W. 9.2 Kgs 10.2 Kgs G.W. 11.2 Kgs 12.2 Kgs MEAS. 2.74 cuft 3.53 cuft *Additional optional 8cm fan is avaiable on request.