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Specifications:

Typical Diameter (Φmm):---------------------8.0, 10.0, 12.7, 15.0, 20.0, 25.4, 30.0
Typical Thickness (mm):---------------------1.0 ～ 50.0
Diameter Tolerance (mm):-------------------+0.0/-0.2 (General), +0.0/-0.02 (High Precision)
Thickness Tolerance (mm):------------------±0.2 (General), ±0.005 (High Precision)
Clear Aperture:---------------------------------- >80% (Small Size), >95% (Large Size)
Parallelism:--------------------------------------3 min. (General), 3 sec. (High Precision)
Surface Quality:----------------------------------60/40 (General), 10/5 (High Precision)
Flatness (per 25mm@633nm):-------------λ /2(General), λ/10 (High Precision)
Bevel (face width x 450):-----------------------<0.25mm
Coating:--------------------------------------------Uncoated, AR, HR, PR, Coating, etc.

Note for BorosilicateWindow:
(1). Custom-made Borosilicate windows at any size are available. Besides round, Borosilicate windows at shape of quadrate, triangular, or other polygonal are available
(2). Thickness from 1.0mm to 50.0 mm is available upon request.