Additional Spectrometer Prisms and Diffraction Gratings are available Additional Info: An effective yet economical tool for demonstrating polarization of light. Unmounted film is available as packs of 2 in 3” x 3” and 6” x 6” sizes. Include instructions. Package Size(L x W x H): 7 X 7 X 2 (IN) Categories: Optics, Polarizing Film HTS Code: 9031.90.9090 UNSPSC: 3.12418e+007 Country Of Origin: TAIWAN