Panel MaterialsMetal Option-We use 12-gauge steel for our metal panels. This is about the thickness of a nickel and is super sturdy. We decided to make these thicker than other companies because they hold up longer and are very hard to bend, unlike other panels on the market. There are definitely cheaper options out there, but their quality will be much less than ours and will likely need to be replaced in a very short time.Plastic Option-Our plastic panels are made of 1/2" thick HDPE plastic. This plastic is commonly used for outdoor uses because of its anti-stick capabilities. We highly recommend if you are in a coastal area to use the plastic option. *Warning before ordering! These are only available in white, and paint does not adhere*