Diameter:12/15/18/19.05/20mm  FL38.1/50.8/63.5/76.2/101.6mm

China PVD ZnSe material,excellent optical properties,up to 100W CO2 laser resistance

Double-sided solid coating,reduces laser loss,laser transmittance up to 99.5%

Clear Aperture(polished)>90%  AR Coating Reflectivity<0.2% Scratch-dig: 20-10

Suitable for Co2 Laser Cutting/Engraving Machine,providing precise and accurate reflection to ensure that your enggravings and cuts are of the highest quality