Available Materials: Crystal, White glass,Blue glass, Corning glass, Sapphire and other material
Diameter Tolerance: +0.0/-0.05mm, customized
Center Thickness Tolerance: ±0.05 mm, customized
Surface Quality: 80/50,60/40, 40/20 or customized
Clear Aperture: >90%
Centering: <3 arc min
Coating: AR coating or customized
Bevel: Protective bevel as needed