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Polarized Film Sheets 3 PcS 78 x118inches20x30cm Polarizer Linear Polarizing Filter Non-Adhesive for Educational Physics Photography LightingSpecification: Polarization: Linear,greater than 999% Size: 78x118 inches 20x30cm Thickness:019mm Feature: Polarizing film have protective film on both sides, before you use it, you have to peel a protective..