These hi-intensity retro-reflective address stickers are highly visible by day, and they are highly visible by Night as well when headlights or a flashlight shine on them. They will "shine" back with a WOW result! (They do NOT light up on their own.) Great for curbside mailboxes. Attractive gold color. 4" high. No tools required. Just peel and stick to any dry, smooth, clean surface. They take only seconds to apply and can save precious moments in an emergency, or when a friend is searching for your home. Made in the USA of high grade 3 mil polyester, with a 10 yr warranty. Very durable. Will last for many years. Will not crack or lift at the edges. Can even withstand power washing! Can't go wrong here! It is made of the same reflective material used on emergency vehicles, school buses, trucks etc!! Made in USA! Instructions included. Select the numbers you need (up to five numbers) from the "Customize Now" tab.