Radnor 2.224" Copper Nozzle with 1/2" bore size is designed for use with 160 - 180 A Tweco No. 1 and Radnor Pro MIG guns. A 3-piece nozzle design includes nozzle housing that is cut and made from 122 DHP copper alloys tubing. The nozzle insulator is made from G7 silicone material that renders the electrical insulation required from the gas diffuser. Self-insulated nozzle with a recessed contact tip relationship finds application in medium to heavy duty welding up to 180 A.