19" - 4U Industrial Rack - Mount Server Chassis Features: 4U EIA RS310C Rack-Mount chassis specification & meets for FCC / CE requirement. Rugged construction and design for harsh industrial environment . Support ATX/Baby AT motherboard and 7-14 slots passive back plane . Hold-Down clamp design to protect plug-in cards from vibration . Shock resistant drive bracket exposed:   MP-P43A / X / MP-P43BX : 3x5.25" open , 1x3.5" open and 1x3.5 hidden drive bays. One 12x12cm two ball bearing fans with removable air filter to have better ventilation and easy replacing . AT/ATX/hot-swappable Redundant industrial grade power supply w/safety-approved . A lockable front door for dust-proof integrity and running security . Excellent mechanical designed for best shock-proof , dust-proof , water-proof and air-tight . The front door with hinge design for smooth opening & security . Clear activity LED indicators on the front side. Optional Bracket can accommodate 2 more 3.5" HDDs & 8cm fan. Model No. MP-P43A MP-P43X MP-P43BX Drive Space 5.25" Half-height 3 3 3.5" Open 1 1 3.5" H.D.D. (Hidden) 1 1 Breaket for 2x3.5 hidden + 1x8 cm Fan 0 could be by option Cooling Fan 8 cm Fan 1 1 Rear Panel * Slot 7/8/12/14 DB-9 3/3/1/1 DB-25 4/6/4/3 Power Supply (optional) PS/II AT 300W   PS/II ATX   300W / 300W Redundant / 400W Safety   UL , CSA , TUV , CE Dimension (W. x D. x H.) mm 482.6x500.0x177.0 Inch 19.00x19.69x6.96 Packing 1pce/1CTN N.W. 12.6 Kgs G.W. 15.7 Kgs MEAS. 3.81 cuft *optional back panles are available on request.