iStar D Storm D-300 3U Rackmount Server Chassis D-300 Case Type: 3U Rackmount Material: Front Bezel- Aluminum alloy; Handle- SECC Zinc-Coated Steel; Main Chassis- 1.2mm SECC Zinc-Coated Steel ( Japan Made ) M/B Type: ATX, Micro-ATX, Up to 12.0 x 9.6 inch External Bays: 2x 3.5'' Drive Bays; 4x 5.25" Drive Bay Internal Bays: 1x 3.5'' Drive Bays Case Type: 3U Rackmount Material: Front Bezel- Aluminum alloy; Handle- SECC Zinc-Coated Steel; Main Chassis- 1.2mm SECC Zinc-Coated Steel ( Japan Made ) M/B Type: ATX, Micro-ATX, Up to 12.0 x 9.6 inch External Bays: 2x 3.5'' Drive Bays; 4x 5.25" Drive Bay Internal Bays: 1x 3.5'' Drive Bays Cooling System: 1x 60mm Cooling Fan