High purity&heating-resistance OD range 1.2mm-360mm, Silicon Dioxide>99.95% ... shape, etc.4. OEM allowed5. certificate :CE 6. application fields: heating element, drying equipment, cooking device, medical equipment,fry&baking equipment ... 50ppm,20ppm,15ppm,10ppm,5ppm One end closed Fire Polished Quartz Sleeve with CE