10 Pack, .030", Tweco-Style, Contact Tip, Wire Feed Welder Contact Tip Is A Copper Replacement Tip Designed For Both Solid & Flux Cored Welding Wires, Tip Promotes Good Electrical Conductivity For Positive Arc Characteristics, Longer Life & Fewer Tip Changes Reduce Expendable Part & Labor Costs While Increasing Arc Time, Compact, Economical.