This 12” x 12” Authorized Personnel Only Notice Sign is printed on vinyl and mounted to heavy duty .063 aluminum. Two pre-drilled holes are at the top & bottom and perfectly spaced for use on U-Channel Posts, a fence, or the side of a building. Aluminum has 1.25” radius corners to protect you from sharp edges and gives a professional finished appearance. For longer life of your printed sign, add lamination for a few dollars more. Lamination helps protect from UV rays to extend the life of your sign and is recommended for outdoor signage. For indoor use, the vinyl print & aluminum will last for several years. Order your signs today for all your Notice Sign needs.