The insulator has his own function ,good insulation and thermal conductivity is low . The welding insulator has two colors: the black and the yellow. The custom can choice depend on their welding torch they used .. Mig/Co2/Tig/Plasma/Argon Welding Torches and Accessories : Our company produce below products: 1.Binzel 15AK,24KD,25AK,36KD 40KD Air Cooling Torch ,501D,401D Water Cooling Welding Torches 2.Panasonic 180A,200A,350A,500A Welding Torch 3.Otc 180A,200A,350A,500A Welding Torch 4.Trafimet 15AK,24KD,25AK,36KD Welding Torch 5.TBI 15AK,24KD,25AK,36KD Welding Torch 6.P80,AG60,PT31,S45,CB150,A141,SG51,JG60,JG100,SG55 Plasma Cutting Welding Torch 7.Tig welding Torches : WP9/WP12/WP17/WP18/WP26/WP20/WP27 Air/Water Cooling Torch 8.Mig/Co2 Welding Parts : contact tip , tip holder, swan neck, welding nozzle, gas diffuser, welding liner ,teflon liner,cable plug , euro connector ,panasonic connector,ot…