- Parallelism: 30 arc seconds or better
- Size: 0.5 +0 / -0.004
- Thickness: 0.2 ±0.002
- Scratch-Dig: 60/40
- Clear Aperture: 0.457 in. min.
- Flatness: < 1 wave
- Substrate Material: Sapphire
$36.00
$36.00
$36.00
In Stock: 200