ZnSe Focus Len Dia 20mm FL50.8mm for Co2 Laser Cutting and Engraving Machine
Material: Znse. Len dia 20mm, Focus length 50.8mm/2", 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 realize engraving or cutting.