Aluminum signs are the most durable and longest lasting type of yard and window sign. They are more expensive than their non-metal counterparts, but they make up for it in durability, quality and appearance. They are a perfect fit for a metal frame of the proper size. All our aluminum signs (.040 quality aluminum) come standard with rounded corners for safety and a professional appearance. We also offer Reflective Aluminum signs. Reflective Aluminum is made of heavy gauge (.080) aluminum with a reflective surface to make the sign highly visible at night when light is refracted off of it. This is great for making signs that you intend to be noticed at night such as a street address or parking sign.