Note:Size tolerance: +0.0/-0.1 mm Thickness tolerance: ±0.1 mm Angle common difference: ±1 ' Smooth finish: I- V level Face shape precision: Lamda /2 @ 632.8nm Side pours: 0.2-0.5 mm Effective aperture: > 85% Coating: Requests according to the customer Material: BK7, rank A optical glass