SIENOC 19 Pin USB3.0 Female To 9 Pin USB2.0 Male Motherboard Cable Adapter (1 pack) USB 3.0 Type A Female to Female Adapter Coupler Gender Changer Connector Backward compatible with USB 2.0 and 1.1 interface Combines two USB 3.0 male cables into a single, longer cable Size :4.5*1.9*1.2cm