C&E 10 PCS USB 3.0 Retractable Cable A Male to B Male 3 Feet, CNE613024 Pulling on the two connector ends unwinds the cable, while the internal ratchet action keeps the cable extracted to the length you want. Pull the cable ends to their limit and the cable will easily wind itself back around the spool, thereby preventing tangles. This flat, long USB 3.0 cable is wound around a central spring-loaded spool. This USB 3.0 cable features a USB 3.0 A male connector on one end and a USB 3.0 B male connector on the other end. The spool assembly measures about 2.0" in diameter and is about 0.9" thick. USB 3.0 A Male to B Male