Description:Lens dia

20mm, anti-reflective coated focal lens for 40-100W

Focus lens is the fitting of CO2 machine, which is used to focus the beam after reflection, to ize engraving or cutting

Meniscus type lens, better foucs and meticulous path of light

Can withstand high power density, firm film, resistant to wipe

Used for processing, fits for engraving machine, marking machine, cutting machine, etc

Specification:Material: ZnSeCoating: 10

6um（AR Both Side）Diameter tolerance: +0/-0

13mmCentre Thickness Tolerance: ±0

25mmFocal Length Tolerance: <±2%Clear Aperture: >= 90% DiameterPackage Includes:1 Piece Focal Len