Diameter Tolerance:  -0.00/-0.15 mm

Thickness Tolerance:  +/-0.10 mm

Focus Length Tolerance:  +/-1%

Centration: <3arc minutes

Surface Quality:  20-10

Surface Figure:  λ/4@633nm

Clear Aperture:  Central 85% of diameter

Bevel:  0.25mm x 45°

Coating:  Single layer MgF2 AR coating or specified by customer