Tweco® Copper Nozzle with a 3/8" bore size is designed to use with up to 250 A Tweco® Spray Master® MIG guns and fits standard gas diffuser. 2.383" Nozzle has a 0.875" OD and is used in heavy-duty welding applications for up to 250 A. It features part number rolled stamped on the outer surface for easy identification. Nozzle is used where longer electrical stick-out is needed or when the nozzle touches the work place is made of 122 DHP copper alloy. It has a 3-piece design that includes a nozzle housing that is cut and formed from copper alloy tubing, a nozzle insert machined from a solid brass and nozzle insulator constructed of silicone material. It has nozzle insert that allows it slide over a metal spring of the gas diffuser. Nozzle offers electrical insulation required from the gas diffuser using the nozzle insulator and is sold as 2 per pack.