|Pet Alert Decals are 4" x 5" and made of a strong weather-proof vinyl static cling material with bright vibrant red color for high EZ alert visibility. Pet Alert decals will adhere to any clean glass surfaces without adhesive and can be placed on any inside window areas anywhere anytime and can easily be removed and reused again. (Homes, Apts, Condos, Business, Rvs) Rescue Rover Pet Alert Decals are designed to alert firemen, police or neighbors that there is an animal or animals inside of property. Properly displayed, Pet Alert Fire Rescue decals greatly increase a pet's chances of survival and being saved. It is our sincere commitment that through the widespread use of our lifesaving Pet Alert Fire Rescue decals, the number of tragic companion animal deaths due to fire or any disaster will be significantly reduced.