2U(HE) 18.9” deep chassis supports PS/2 power supply and ATX MB. Drive bays (1)5¼ ,(2)HDD, (1)FDD*. Optional Temperature Alarm Board Features: 2U 19" Rackmount Chassis Supports ATX/EATX Motherboard Supports (1)5¼ ,(2)HDD, (1)FDD* Drive Bays (2) 2.0 USB ports on Front Panel (1) 8cm ball-bearing fan on Rear Panel Fan failure & Temperature Alarm Board Dual Lockable Front Doors and Replaceable Air Filters