Will this letter stay readable at night?

Yes. The face is reflective Mylar, so it brightens when headlights or a flashlight hit it. It is not illuminated on its own.

Where can I stick it?

On smooth, clean, dry surfaces such as metal mailboxes, painted wood, glass and plastic signs. Rough or dirty surfaces weaken the bond.

The plastic and Mylar film are made for outdoor use, but adhesion is the weak point. Press it down firmly and avoid mounting over peeling paint.

It is a 3-inch letter, about 3.375 inches wide. Check that this matches the other characters in your address.

No. It is self-adhesive, so it applies by peeling and pressing. No screws or nails are needed.

Yes, though the reflective face matters most outdoors. Indoors it works like any adhesive letter.

At Tractor Supply Co, for $2.19, as of our latest check.

$2.19at Tractor Supply CoChecked Nov 11

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