Product Name: Clear Quartz Glass Tube for Heater Model NO.: quartz glass tube Material: Sio299.99% Shape: Tube Type: Refractory Material Feature: Long Time Materials Refractoriness (?): 1100-1600 Advantage: High Temperature Resistance Color: Transparent Trademark: yongsin Transport Package: Strong Wooden Box Specification: according to request Origin: Donghai, China HS Code: 7002209000 Product Description Clear Quartz Glass Tube OD range from 2.2mm to 200mm,SiO2>99.95%,excellent visual and chemical performance,high thermo-stability,anticorrosive. Transmittance of visible light>90%. Dehydroxylation available upon customer's request,HO content less than 50ppm,20ppm,15ppm,5ppm,2ppm or 1ppm.