... to all TAB, COG, FOG, HSCand other optical equipment on the bit LCM.Material:1.Optical Grade Synthetic Fused Silica ... Sio2 99.99%-99.995%ZCQ have CNC machining equipment can ensuring accurate processing.Our tolerance for the quartz ... samples. Other usages are in the industries of national defense equipment, automation systems, andsemiconductor, metallurgical, electric light, ecommunications,light ...