Available in outer diameters from D20 to 30mm, thicknesses from 5 to 10mm, and inner hole diameters from 10 to 15mm. The surface is precision-formed and matte-finished without polishing, retaining a blank-state machining allowance for secondary finishing or direct use. The fused silica material features an extremely low coefficient of thermal expansion and
excellent thermal shock resistance, ensuring long-term stable performance under high-temperature operating conditions without contamination or deformation.