The optical flats are used to measure the flatness error of plano optical components with high surface quality.
| Material：H-K9L(CDGM) | Dimension Tolerance：±0.2mm |
| Surface Figure：See details in the list | Thickness Tolerance：See details in the list |
| Parallelism：<1' | Bevel：0.2~0.5mmX45° |
| Surface Quality：60/40 | Coating：None |
