Tweco® Eliminator® Series Standard Duty Contact Tip accommodates 0.045 inch wire and is perfect for use with 250 to 650A Tweco® Eliminator® MIG guns. This contact tip is specially made for Eliminator® style MIG guns. Delivers better conductivity resistance properties. Offers increase tip life. Reduces micro arcing on the inside diameter surface. Machined from a copper alloy tubing providing a consistent and smooth inside diameter surface. Increased surface contact between contact tip/diffuser for better electrical conductivity. Twist it quarter turn clockwise. No threads to worry about. When tip wear point is reached after use, twist it half turn counter-clockwise to expose a new wear point. This doubles the life of the tip. Thick-walled diffuser design acts as heat sink and conducts heat away from the arc source. Increases electrical conductive surface area and thereby increases electrical conductivity.