Interface type: SATA series.Material: Copper. Length: 50cm.Package Include:4PCS Extension Cable. SATA data power cables, one end is a male, the other is a female, now many HD players have connected SATA interface. SATA data cable and SATA power cable, the two wires are combined into one. You can use this cable to directly connect the device and the hard disk, which is very convenient. The thin cable design helps reduce clutter and increase airflow in the computer / server chassis for optimal system performance.