Up for your bid is a high quality NEW ZnSe Plano - convex lens. The lens is 0.75" (19.05mm) in diameter, and has six kinds of focal lengths of 1.5" (38.1mm) / 2" (50.8mm) / 2.5" (63.5mm) / 3" (76.2mm) / 4" (101.6mm) / 5" (127mm) . It is coated for CO2 lasers at 10.6um wavelength.It is coated for CO2 lasers at 10.6um wavelength.This would be a great lens for a CO2 engraver or laser cutter, to focus the beam into a tight spot. This lens is NEW in the original FACTORY BOX and is untouched. You get an unopened box. Note: Please choose the focus length when you make an order.