Type:
-Square Windows;
-Circular Windows;
-Wedge Windows
-Brewster Windows;
-Elliptical Windows;
Material : BK7A;UV Fused Silica;Silicon;Ge;CaF2;MgF2;ZnSe,etc
Surface Flatness: <lambda/10@633nm
Surface Quality: 60/40;40/20;20/10;10/5
Dimension Tolerance: <+0.00/-0.20mm
Clear Aperture: >85%
Bevel: 0.3mm×45°
All of these specifications are just for reference.