The optical flats are used to measure the flatness error of plano optical components with high surface quality.
| Material：H-K9L (CDGM) | Dia. Tolerance：±0.2mm |
| Surface Figure：λ / 10 @ 633 nm | Surface Quality：60/40 |
| Parallelism：See details in the list | Bevel：0.2mmX45° |
| Thickness Tolerance：See details in the list | Coating：None |
