... :white,Ivory,yellow ISO9001 Ceramic Insulator for hand extrudersFeatures: low heating power, long life, good insulating properties, thermal effectsAl2O3 Technical Parameters:PorpertyUintSlimMaterial ... %0Dielectric Constantεr10Dielectric Loss Angletanδ0.001 Ceramic/porcelain Insulator for welding machinesMaterial:95%Al2O3,SteatileColour:white,Ivory,pink,yellowISO9001