Supermicro CSE-M35TQB 5-in-3 Hot Swap SAS/SATA Mobile Rack (Black) Occupancy: 3x 5.25" Drive Bays Space Capacity: 5x 3.5" Hot-swappable SAS/SATA Hard Drives Compatibility: SC743/ SC745/ SC748 Series Chassis Cooling System: 1x 90mm Exhaust Fan Compatibility Chassis: SC748 Series; SC745 Series; SC743 Series