ZnSe Laser Focusing Lenses – PREMIUMFEATURES Are you looking for a high quality focusing lens that will promote optimal performance of your CO2 laser machine? Well look no further! These ZnSe (zinc selenide) lenses are recommended for use in all Boss Laser LS & HP machines. With a 14% improved transmission rate compared to most imported lenses, these provide excellent optical properties including high temperature laser resistance and a longer lasting performance lifespan, allowing you