Cloudray China CO2 ZnSe Focus Lens Dia.18 19.05 20 mm FL38.1 50.8 63.5 101.6 127mm 1.5 - 4" for Laser Engraving Cutting Machine WholesaleBuy Directly From Cloudray Official Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.