Radnor 15 H Series Heavy Duty Contact Tip accommodates 0.035" wire and is designed for use with 200 - 500 A Tweco No. 5 MIG guns. Threaded style contact tip is machined from copper alloy tubing that gives a surface of consistent and smooth inside diameter. Contact tip with flush tip relationship provides proper contact with a gas diffuser when installed to the MIG gun and is ideal for use in heavy duty welding application up to 500 A.