Detailed features:

19" 4U 20-slot rack mount enclosure for backplne and CPU cards with ATX-1125BTA-R300 300W ATX power supply (without backplane)

Construction:
Heavy-duty steel
Drive Bay:
Five drive bays; three 5.25" HDD and one 3.5" open, and one 3.5 hidden
Backplane:
20-slot ISA, PICMG single/dual/quad
segment systems
LED Indicators:
LED indicators for HDD and power on/off
Switches:
Reset and power on/off
Keyboard Connector:
AT type KBD connectors on both front and rear panel
Color:
Light gray
Hold-down Clamp:
Adjustable card retainder
Air-Filter:
One removable front-panel filter
Cooling:
Total four cooling fans, three behind the fan filter panel and one within power supply
Power Supply:
ACE-935A PS/2 300W AT power supply or
ATX-1125BTA-R300 300W ATX power supply
Dimension in mm:
177(H) X 482(W) X 638.0(D) (7" X 19" X 25.1")
Weight:
18KG (Net)
Operating Temperature:
0 to 55 C (32 to 131 F)
Storage Temperature:
0 to 70 C
Relative Humidity:
5 to 95%, non-condensing
Vibration:
5 to 15Hz, 0.25G peak to peak
15 to 500Hz, 2.5G peak to peak