Size:200mm-300mm Thickness:5mm-10mm Softening point:1670 rupture strength compression 1100Mpa quartz glass sleeve (quartz sleeve) It is made from the clear quartz tube, thermal bending, sealing fire polishing ,bevel edge , end round sealing, Flat sealing. Can be processed according to request. Good spectral transmission, accurate dimension and lower OH content, The quartz glass sleeves usually ...