Material:BK7 grade A optical glass

Size:Dia 3.0~200.0mm  x  thickness  0.3~60.0mm 

Dimension tolerance:0/-0.1mm

Thickness Tolerance:±0.2mm

Angle tolerance:5 arc sec—3 arc min

Optical parallelism:5arc seconds—1 arc minutes

Flatness(@633nm):0.05 wavelength—1wavelength

Surface quality:20/10scratch and dig

Coating:available upon request

Bevel 0.25mm x  45

square optic windows