CO2 Focus Lens Dia. 18mm FL 38.1mm-127mm for CO2 Engraver Cutter Premium 4 Sizes 101.6mm

Description: Four models(with different FL) 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 realize 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 machine cutting machine etc.. Specification: Material: Znse Lens Diameter: 18mm / 0.71inch Focal Length 38.1mm / 1.5inch 76.2mm / 3inch 101.6mm / 4inch 127mm / 5inch Coating: 10.6um( Both Side) Diameter tolerance: +0/-0.13mm Centre Thickness Tolerance: ±0.25mm Focal Length Tolerance: = 90% Diameter Scratch/: 40-20 Surface Accuracy: 入/2per1 Dia Package Includes: 1 Piece Focus Len (Packed in boxes with foamed cotton)