High purity&heating-resistance OD range 1.2mm-360mm, Silicon Dioxide>99.95% ... . OD:1.2mm-360mm2. thickness of wall:0.5mm-12mm3. type:transparent,translucent,milky-white,red,u-shape,twin tube, special ... shape, etc.4. OEM allowed5. certificate :CE 6. application fields: heating element, drying equipment, cooking device, medical equipment,fry&baking equipment ...