A4 diffraction sheet 0.25mm thickness lens ,special for party and any light show Viewing light directly will turn into rainbow effect Sheet of Diffraction Grating that has 13,500 lines per inch sheet; Every Diffraction sheet is separated by a faint line. The line does not distort or disturb the light quality of the diffraction; Diffraction Gratings are used for the direct viewing and analysis of spectra from different gas tubes and other light sources.
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