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GaAs Co2 laser focusing lens, Diameter18mm/19mm/20mm/25mm

Co2 laser focusing lens, (18,50.8)(18,101.6)(19,50.8)(19,63.5)(20,38.1)(20,50.8)(20,63.5)(20,76.2)(20,101.6)(20,127)(25,63.5)(25,76.2)(25,101.6)(25,127)(25,50.8)mm