• Total 4 bays
• Accepts up to 12x13"  ATX mother board
• 6 x 4cm fans
• front access USB port

Specifications:

• Drive Bays:
  3x hot-sway (SATA, SCSI U320)
  1 x 2.5" internal
• One PCI Riser card
• Operational temperature range: 1 ~ 50°C
• Cooling Fans: 5x 4cm fans in the middle, 1x4cm rear
• Power Supply
  ATX - redundant 400-500w power
• Dimensions: 19" x 29 x 1.74"(W x D x H)
• Gross weight: 36lbs

Options:

• Low Profile CPU fans
• Riser card with ribbon cable (see riser card notes)
• I/O shield for different mainboard
• Black only
• Sliding Rails 
• 3 x Hot Swap Tray ( SATA, SCSI U320)