Ceramic Insulator for plastic welding torch Material:95%Al2O3,Steatile,cordierite Colour:white,Ivory,yellow ISO9001 ... Constantεr10Dielectric Loss Angletanδ0.001 Ceramic/porcelain Insulator for welding machinesMaterial:95%Al2O3,SteatileColour:white,Ivory,pink,yellowISO9001 Ceramic Insulator ...