Material

K9 fine annealed

Surface Flatness

λ/5 @633nm

Surface parallelism error

<3′

Clearing

IV grade

Back

Fine grinding

Model

               Diameter

 Thickness

WN01GM-010

10.0

2.0

WN01GM-012

12.5

2.0

WN01GM-020

20.0

2.0

WN01GM-025

25.0

2.0

WN01GM-038

38.0

4.0

WN01GM-050

50.0

4.0