Specifications: 2U Rack Mount Chassis,rack mount server case,server case. S2620 chassis:2U(550mm * 430mm * 89mm) HDD bay:STD open 3.5" Power supply: A2302001 A2402401 Cooling fan: B8025H I/O Shield:Took with Motherboard CD-ROM:STD open 5.25" FD:STD open 3.5" Sliding rail:3 sections full extension Motherboard:12"*13" (the largest server board)