The N-VA1-52 Laser Safety Glasses are for scientific alignment purposes with wavelengths of 190-370 nm OD5+ and 400-700 nm OD1+. It has a Rimmed frame with grey color polymer lenses that has a 4% VLT (visible light transmission). The Rimmed frame has unmatched protection, comfort, and style, offering sleek styling that fits comfortably over prescription frames or can be worn as a stand-alone spectacle. This model is CE certified. Meets ANSI Z136.1 and EN207.