A. Product Use: A linear polarizer film suitable for 3D glasses, mirrors, magic shows, and projectors. It is an important component for auxiliary image display and is used in various fields. B. Replacement Suggestion: Unless the polarizer film is scratched, there may not be a need to replace it every time. If you are a beginner, it is recommended to use a professional polarizer remover and laminator to replace the polarizer film. C. Product Features: It has relatively high polarization efficiency and light transmittance. It supports double-sided protective lenses and has a scratch-resistant function. D. Product Specifications: - Type: With adhesive - Color: Black - Material: Triacetyl cellulose (TAC) + Polyvinyl alcohol (PVA) - Size: 30 x 20 cm, Thickness: 0.17 mm E. Package Contents: 5 pieces of polarizer film. Only the above package contents are included, and no other products are included. F. Notes: Light shooting and different displays may cause the color of the items in the picture to be slightly different from the actual object. The measurement error is allowed to be ±1 - 3 cm.