Redshift Chinese CO2 laser reflect mirror

Specification
Diameter Tolerance: +0/-0.13mm
Thickness Tolerance: ±0.25mm
Parallelism: ≤3 arc min
Clear Aperture: >90%
Surface Flatness: λ/4 per 1” Dia @ 632.8nm
Surface Quality: 40-20 S-D
Angle of Incidence: 45°