< Back SpectroBurst™ Viewer Twin Pack $20.00 Four diffraction gratings in circular frames (two single-axis and two double-axis)Two multi-function white LED flashlights with magnetic basesTwo sets of instructions for Diffraction Detective™ game Mix + match gratings — two singles, a single and a double, or two doubles for a full SpectroBurst™.Please purchase from our distributors or contact spectroburst@spectroclick.com ABOUT For more information on the SpectroBurst™ Viewer, watch this short video: