Zomei Ultra Slim AGC Optical Glass UV Ultra Violet Lens Filter - 40.5mm Only 2.82mm thickness, Wide-angle lens compatible ultra thin frame. Transmittance up to 99.7%. Made with no compromise. Glass mounted with high pressure press technology. Original AGC Optical Glass from Japan. All Materials Used in this filter Meet the Requirements of European Union's standards of Environ Ment Protection-ROHS(Restrictions on Hazardous Substances).