Good Linear polarizer film for 3D glasses/Mirror/ show /projector It is an important part to help display the ,which is widely applied in any field. The polarizer film does not need to be replaced each time,Unless the polarizer film has scratches; If you are a Beginner, it is recommended to use a professional Polarizer remover machine and film to replace the polarizer film. High polarized efficiency, high transmittance Could supported Both side protective lens, unti scratch type: No Adhesive Colour:black Material:TAC+PVA Size:30 x 20cm, thickness: 0.17mm Package Contents: 5x Polarizing Film Sheet Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.