Diffraction Grating Slide Linear 1000 Lines mm 2x2" Pack of 10 sold2025 mountain bikes and eBikes sold2024 mountain bikes and eBikes Will secure the end of your tape while laying out close Tolerance measurements from the end or the center of your material Product Features Makes the study of light and color fun and unforgettable Features highly efficient embossed Holographic Optical Elements Used for the direct viewing and analysis of spectra from different gas tubes and other light sources Spectrum produced from our gratings is the brightest possible with a minimum of distracting visual noise Great for overhead projector or 35mm slide projectors