Good quality Linear polarizer film for 3D glasses/Mirror/Magic show /projector It is an important part to help display the image,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 laminating machine to replace the polarizer film. High polarized efficiency, high mittance Could supported Both side protective lens, unti scratch type: No Adhesive/with Adhesive Colour:black Material:TACandPVA Size:30 x 20cm, thickness: 0.17mm Package Contents: 5x Polarizing Film Sheet Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.