The SlimSAS 8i SFF-8654 to 4 x SFF-8639 U. 3 Cable is a high-speed data transfer cable commonly used in computer storage systems. It is designed to connect a motherboard or host controller with a SlimSAS 8i SFF-8654 connector to up to four U. 3 devices with SFF-8639 connectors. The cable measures one meter in length, making it suitable for use in computer systems with a reasonable distance between the motherboard or host controller and the U. 3 devices. The cable is made up of high-quality materials, including copper conductors, to ensure reliable and fast data transfer.