Material | K9 |
Diameter | 25.4mm(1") |
Height | 19mm |
Dimension Tolerance | ±0.1mm |
Surface Quality | 60-40 |
Surface Flatness | |
180°Deviation Toleranc | <8 arc seconds |
Clear Aperture | >90% |
Bevelling | 0.25mm*45 degree |
Coating | Three Reflected Surfaces are coated with silver |