Multiwave YAG Harmonics Alexandrite Diode Safety Glasses - Model 300 The Model 300 frame is a spectacle style laser safety eyewear with a Black nylon frame made with extendable arms. The model 300 laser glasses have adjustable telescoping temple bars with a spectacle style design that provides comfortable laser protection. The model 300 laser glasses will keep your eyes protected within the wavelength ranges listed below. TheMultiwave YAG Harmonics Alexandrite Diode polycarbonate lenses are lightweight and have exceptional optical clarity for all day wear and is an excellent choice for any industrial, medical or laboratory using Multiwave YAG Harmonics Alexandrite Diode lasers. OD>5+ from 190-534nm OD>5+ from 730-1090nm OD>7+ from 1064nm Visible Light Transmission = 10.6% Laser Specifications Multiwave YAG, Harmonics, Alexandrite Diode Polycarbonate Filter