Material: Engineer Grade Reflective Sign on .080 Aluminum with two 3/8″ pre-drilled holes for easy mounting. Reflective Sign made with 3M Engineer Grade Prismatic sheeting Heavy-gauge (.080) rust-free Aluminum Easy Mounting: Pre-drilled 3/8-inch with holes at top and bottom center Our Sign meets Federal MUTCD specifications Reflective Sheeting and Inks rated by 3M for at least 7-years no-fade service NOTE: This design is usually referred to as the “Federal Standard” because if your state doesn’t specify a different “state specific sign”, then this is most likely the sign that you should use.