12mm CVD ZnSe Focal Focus Lens for 40W Laser Engraver Cutter Focal Length:1 in. (25.4 mm) Clear Aperture: >= 90% Diameter

Clear Aperture: >= 90% Diameter

Moderate Power 40–70% = 8

HIGH PERFORMANCE: OMTech's 50W laser power supply delivers excellent performance with greater than 90% efficiency and fast 1-millisecond response times

and its inner activated charcoal filter to absorb all your work's harmful gases and unpleasant odors

12mm CVD ZnSe Focal Focus Lens for 40W Laser Engraver Cutter Focal Length:1 in. (25.4 mm) Clear Aperture: >= 90% DiameterCutting Edge Features: HIGH QUALITY CVD ZnSe: OMTech's powerful focus lenses are manufactured from premium zinc selenium via chemical vapor deposition for superior optical properties. HIGH TRANSMITTANCE: Both sides of each lens are covered with strongly antireflective coatings to achieve at least 99. 5% transmittance rate for infrared light at a wavelength of 10. 6 microns. LASTING DURABILITY: Our laser engraver focus lenses' double sided coating