USBe-1 (A-B) USB 2.0 Cable Specification:

Conductors: Solid Core High Purity Oxygen Free Copper
Conductor Gauge: 20 AWG X 4
Insulation: Dupont TEFLON
Shielding Type: Copper Braided Shielding
USB Shell: Beryllium Copper (BeCu)
Pin: Gold Plated 4N Copper
Termination: Crimping