Easy identification - Each contact tip is marked showing Part No. and wire diameter. Excellent electrical properties. Inside diameter tolerance is held to Plus or Minus.003 in. Designed to be used with aluminum welding wire. Used in standard welding application up to 600 amperes. Threaded style contact tip to ensure proper contact with a gas diffuser when installed to the MIG gun. Machined from a copper alloy tubing providing a consistent and smooth inside diameter surface. Wire size: 3/64 in. Tip I.D.: 0.059 in. Type: Standard.- SKU: ORSNO6151