All signs are made of .080 rust proof aluminum with engineer grade reflective or high intensity prismatic reflective. Engineer Grade signs have an average lifespan of 7 years while the high intensity prismatic signs have an average lifespan of 10 years and are 10x more reflective than engineer grade. All signs come with pre-punched holes ready for mounting. When ordering please specify: 1. Municipal Name (example: ARLINGTON) 2. If it is a City/Town/Village/Borough (example: CITY LIMITS)