Diffraction Grating Slide Linear 1000 Lines mm 2x2" Pack of 10 sold2025 Multi scene use A good phone B0DK1NFLD9 Multi scene use A good phone holder that can be used anywhere you want UAVs have developed along two very distinct paths Diffraction Grating Slide Linear 1000 Lines mm 2x2" Pack of 10 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