Anti-collision window stickers: 9 sheets of anti-collision window stickers in 36 different shapes. Vivid patterns can effectively prevent birds from hitting the window glass. How to use: Make sure the surface is smooth and without texture; clean the surface to ensure there is no dust and grease on the surface; attach after spraying some water and stability. Reusable window stickers: made of high-quality PVC material, sturdy to stick on windows and glass doors, requires no glue and requires no effort to peel off. Clear frosted design: frosted transparent and visible from the outside and inside. We recommend that you attach the stickers to the outside of the window. Product description Material: PVC Removable and reusable Durable, non-toxic and no bad odor Double-sided printing, visible from the outside and inside How to use: 1. Keep the smooth surface clean and free of texture, dust and grease on the surface. 2. Spray water on the smooth surface for easy movement and stability after attaching. 3. Tear off the stickers. 4. Apply the stickers and remove the remaining water. Package includes: 9 * sheets (total 36 pcs)