The Supermicro CBL-SAST-0957 enables MiniSAS HD (SFF-8643) to U.2 PCIE (SFF-8639) with power cable connections for storage. The length from U.2 to MiniSAS HD is 55cm and from U.2 to 4-pin is 45cm. This cable is compliant with T10 and SFF standard and is verified with Supermicro servers, AOC cards, and storage. Each Supermicro cable is validated to ensure quality and performance. Manufacturer Supermicro Length 55cm Cable Type MiniSAS HD Cables Connectors Host - MiniSAS HD (SFF-8643) with 4-pin power Connectors (Other Side) Target - U.2 PCIE x4 (SFF-8639) Length Under 1m Warranty 3 Years Warranty