This 4-wire twist lock plug is made with plastic.THE 4-WIRE TWIST-LOCK PLUG IS ENGINEERED FOR A MAXIMUM CURRENT OF 20A AT EITHER 125V-250V. 20 AMP Round Black 4-Wire Twist Lock Plug Plastic The primary color of this product is black and it comes with black hardware. This 4-wire twist lock plug features a round shape with a modern style.