10pcs 30*20CM Universal Linear Polarization Sheet Polarizer Film For Watch multimeter calculator LCD display repair Introduction: Great for doing cool science projects/experiments. Also great in photography setups Available in Various Sheet Sizes for your Customized Use The sheet is 0.13mm thick and 11.8" X 7.8" (30cmx20cm), Important( ) Makes the study of light and color fun and unforgettable. Features slide mounted frames for easy handling during classroom experiments. Ideal for experiments involving birefringance, light scattering and more. Polarizing filters are used for experiments involving birefringence, light scattering, polarized light experiments, light reflection, Brewster';s angle and how polarized sunglasses work. Same linear polarized material as our Linear Polarized 3-D glasses