20 Pieces White Butterfly Anti-Collision Window Clings Alert Stickers Window Decals Prevent Bird Strikes on Doors and Windows Non Adhesive Vinyl

20 Pieces butterfly anti-collision window clings alert window decals prevent bird strikes on doors and windows, non adhesive vinyl Wide application: Stick on glass panels, verandah doors or bay windows, decor windows and glass doors. Feature: Reflecting ultraviolet sunlight as glowing warning sign for birds but as frosted or etched glass to humans. Easy to assemble: Step 1, clean the window with a duster. Step 2, spray a mist of water on the glass. Step 3, peel the anti-collision window cling from the vinyl backing and place it on the window in any design you like; Step 4, remove the bubbles. Specification: Colors: White Size: about 5.91 x 5.91 inches/ 15 x 15 cm Package includes : 20 x Window clings Note: When you attach the window clings to the glass, make sure that the distance between them is not more than 6 inches, so as to maximize the effectiveness of preventing birds strike on windows.