| Substrate Material | Pyrex glass or substitute |
| Diameter Tolerance | +0/-0.005" (+0/-0.13 mm) |
| Th Tolerance | ± 0.010" (± 0.25 mm) |
| Clear Aperture | 85% Central Diameter |
| Parallelism | 3 arc min |
| Flatness | 1/4 wave at 6333 nm |
| Surface Quality | 40/20 |
| Coating | Protective Gold |
Pyrex Flat Mirror
$150.00 – $195.00