... Copper,CuCrZr ,CuAg 2.Good quality and reliability. 3.Maintain hardness at the highest temperatures. 4.Extremely durable. Detailed Product DescriptionWelding contact tip ... Tweco, Bernard, Esab, Panasonic, OTC, Kemppi, Tregaskiss, Fronius etc.Welding contact tip, material Cu-E / CuCrZrBinzel type: M5*18, M6*25, M6 ... 45, M6*42, M6*70Packing: neutral packing , 50pcs/plastic bag Contact Tip M6X25mm / 28mm