uxcell USB 3.0 A Type Female to Female 20 Pin Box Header Slot Adapter Add Two USB 3.0 ports to your motherboard's 20-pin Header. Convenient solution for connecting USB 3.0 devices to the motherboard. 20-Pin Female IDC 2X10 Motheboard Header Length: 8 inches (20cm) Compliant with USB 3.0 specifications