Hunst China CO2 ZnSe Focus Lens Dia.12 18 19.05 20mm FL38.1 50.8 63.5mm for Laser Engraving Cutting Machine Spare Parts $100 - $400 摇动立柱手柄，当红点重合时，即为焦距。

摇动立柱手柄，当红点重合时，即为焦距。

thereby improving the life of the power supply

packaging bottles

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1: Cool the laser head and blow away the residue from the lens

Hunst China CO2 ZnSe Focus Lens Dia.12 18 19.05 20mm FL38.1 50.8 63.5mm for Laser Engraving Cutting Machine Spare Parts $100 - $400 摇动立柱手柄，当红点重合时，即为焦距。High quality ZnSe crystal: China PVD ZnSe material, Excellent optical properties, Up to 200W CO2 laser resistance. Superb coating process: Double sided solid coating, reduces laser loss, laser transmittance up to 99. 8%High precision process: Eccellent substrate Precise sling, polishing grinding processes, high temperature, laser resistance. 1. Use an air bulb to blow off any loose contaminants.(dust,lint particles) 2. Squeeze a few drops of acetone