Convert the 3 ×5.25” bay into a 4 ×3.5” HDD module with 12cm sleeve bearing cooling fan Compatible with ATX case with 3 x 5.25 drive bays Ideal for CM Stacker and other cases Key features: Convert the 3 ×5.25” bay into a 4 ×3.5” HDD module with 12cm sleeve bearing cooling fan Compatible with ATX case with 3 x 5.25 drive bays Ideal for CM Stacker and other cases Specification: Device space 5.25” device × 3 Dimension 184 ×153 ×129 mm Fan dimension 120×25 mm Fan speed 1200 rpm Bearing type Sleeve bearing Voltage rating DC12V Connector 4 Pin