Cheap And Discounts Hunst II-VI ZnSe Focusing Lens Diameter 20mm FL 50.8mm 63.5mm Suitable for CO2 Engraving and Cutting Machine Accessories Wholesale. Buy Directly From Merchant HUNST Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.