19" - 4U Storage Chassis - Industrial Rackmount Chassis Features: 4U 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 . Included 8x drive space are easily installed with HDD / Mobile HDD Rack / CD-R/RW drive device . Extruded & durable Aluminum handles . 1 x 12cm ball bearing Fans with removable Air filter to have better ventilation and easy replacing . AT 300W / AT 300W Redundant industrial grade power supply w/safety-approved . Excellent mechanical designed for best shock-proof , dust-proof , water-proof and air-tight. Model No. MP-S4HAx / MP-S4VAx (4U) MP-S4HRx / MP-S4VRx (4U) Drive Space 5.25" Half-height 8 8 3.5" Open     3.5" H.D.D. (Hidden)     Interface SCSI-1 / SCSI-2 / SCSI-3 / Ultra SCSI / Ultra II SCSI Internal Cable IDC (50/68) x 8 ID Switch 8 Cooling Fan 8 cm Fan 1 2 12 cm Fan 1   Power Supply (optional) PS/II AT 300W   Redundant AT   Redundant 300W Safety   UL , CSA , TUV Dimension (W. x D. x H.) mm 482.6x500.0x177.0 Inch 19.0x19.69x6.96 Packing 1pce/1CTN N.W. 12.9 Kgs 14.5 Kgs G.W. 15.7 Kgs 16.0 Kgs MEAS. 3.67 cuft 3.7 cuft *Additional optional 8cm fan is avaiable on request.