Radnor Standard Duty Contact Tip accommodates 0.045" wire and is designed for use with 160 - 250 A Radnor, Radnor Pro, Tweco, Tweco No. 1 as well as Tweco Spray Master MIG guns. Threaded style contact tip is machined from copper alloy tubing that gives a surface of consistent and smooth inside diameter. It provides proper contact with a gas diffuser when installed to the MIG gun and is ideal for use in standard welding application up to 200 A.