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CNCOLETECH CVD II-VI ZnSe Focus Lens Dia:18mm 19mm 20mm FL:38.1mm/1.5″ for CO2 Laser Engraving Cutting Engraver/Cutter 40W-200W
Material: Hight class CVD Znse material (US II-VI)
Focal Length:38.1mm/1.5″ ; Dia:12mm/15mm/18mm/19mm/20mm optional; Thickness:2.2-2.3mm;
Double-sided solid Coating;Resistance to wipe;High transmittance; Long service life$20.00