�� Specifications:
�� Material: Anisotropic synthetic sapphire crystal (Al2O3),
�� Orientation: Random
�� Diameter Tolerance: +0.0, -0.1mm
�� Thickness Tolerance: +/-0.2mm
�� Clear Aaperture: >80%
�� Parallelism: 3 arc minutes
�� Surface Quality: 80-50 scratch and dig
�� Flatness: 2 �� per 25mm at 633nm
�� Protective Bevel