... 1000mm, thickness is from 0.2 to 50mm. 3inch C-plane, 4 inch C-plane, 6 inch C-plane,8inch C-planeQuartz ... chemical stability, bubbles, striped, uniformity and birefringence and with general optical glass), so it is in all kinds of bad work ... stability coefficient of optical indispensable optical materials. This product is mainly used for the printing equipment, fiber optic equipment. 8 inch C-plane