Specification: Polarization: Linear Size:7.8x11.8 inches/ 20x30cm Thickness:0.19mm Feature: These small polarizers are used for Motorcycle dashboard display, small size screen, projector screen, electronic watch screen. There are three layers of display film, the middle layer is display film, with protective film on both sides How to use: 1. Confirm the sticky side (tear a little protective film at the corners to confirm the stickiness, do not tear it all apart) 2. While keeping the power on, take the screen as the center point, the sticky side is overlapped on the screen, the polarizing film rotates 360 degrees clockwise. Find a clear location, mark the location and cut it and paste it. Note: Why rotate? Each display film must be rotated to match the position, and each screen angle is different