... length :63.5 Surface quality:20-10 Apply:Laser drilling, engraving ,cutting.,etc Laser lens co2 specifications: SpecificationFocal Length Tolerance: ±1 ... and Plano-concave mirror and crescent lens. Capability Can stand high-power density, the film is firm, wipe resistance is great, ... film(10.6μm )≥99.9%. The parameter for laser lens Part Nodiameterfocal lengthshapeD20-120mm38.1mmPX, PV, CV-CXD20- ...