21"x15" Aluminum Sign Blanks
Our 21"x15" Aluminum Blanks are manufactured to federal and state specifications, when applicable. All Blanks are available in a variety of grades including Engineering (EGP), High Intensity (HIP) and Diamond Grade Reflective Sheeting (DG3). Blanks are constructed of heavy-duty 0.063 or 0.080 gauge, Alodine treated, aluminum for maximum exterior life.
