This pack of 4 static window stickers is made of high-quality PVC and is easy to apply. They prevent birds from hitting glass doors or windows and can also act as home decor. The stickers are easy to remove and leave no residue.Features:1. SAVE BIRDS: These window decals work as a bird strike deterrent, to stop birds from hitting your transparent glass doors or windows.2. WIDE DECORATION: These windows cling stickers can be applied to glass doors, patio doors, sliding glass doors, these window decals can stick easily on any flat surface.3. NO ADHESIVES, NO RESIDUE: Our window stickers are made of high-quality materials, sturdy to attach to the window, and easy to peel off. They all can be removed from windows and won't leave a sticky residue.4. MORE USE: It can not only be used as anti-collision window sticker for birds but also act as a great window decor for home, office, yoga, etc.5. EASY TO USE: These decals are static clings, just peel off the transparent backing paper, spray some water on the glass surface, and stick the smooth side of the clings to the glass.Specification:Material: PVCColor: BlueSize: 22 x 30cmWeight: 94gPackage Included:1 x Anti Collision Window Decals for Birds