Students observe the characteristic color imparted to a flame from various elements... They also observe that different, distinguishing colors. Using the spectroscope, they see the light emitted from familiar light sources and compare the appearances... Kit includes 24 spectroscopes, 15 handles, one 4 foot length of wire, and one bottle each of chloride, potassium chloride, potassium nitrate, sodium hydrogen carbonate, sodium chloride, strontium chloride, and strontium nitrate... Instructions and MSDS included.