Specifications
Length (mm): 152.4
Width (mm): 152.4
CT (mm): 19.0
Specifications: Length: +/- .25
Center Thickness (CT): +/- .2
Cosmetics: 60/40
Surface Flatness: 1/10 wave @ 632.8nm
Parallelism: 30 arc seconds
Clear Aperture: 90% of surface area
All dimensions are in millimeters.