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| Diameter | 2-250mm |
| Radius | 5mm |
| Centration | <3min, <1min or <30'' |
| Clear Aperture | >90% |
| Surface Roughness | 60/40, 40/20 or better |
| Surface Flatness | lambda/4, lambda/2 or as request |
| Chamfer | 0.1+/-0.05mm x 45deg |