USB 3.0 Uses Tinned Copper Stranded 28 AWG Cables. USB 3.0 Cables Contain Twice As Many Wires As USB 2.x To Support SuperSpeed Data Transmission & Are Thus Larger In Diameter. Power Up To 3.6 W May Be Used. FullDuplex Communications. USB 3.0 Standard Does Not Directly Specify A Maximum Cable Length Requires only that all cables meet an electrical specification for copper cabling with AWG 26 wires. Available in Lengths 3, 6, 10 & 15ft.