About this item Hardware only,not including door panel The folding door kit is made of high-quality carbon steel with white finish, which ensures that the product is corrosion-resistant, waterproof, fireproof, rust proof, durable, and maintains many years of beauty and service life Track size = door opening + 6" or more For example, if your door opening is 60" long, the required track length is 60" + 6" Hardware fit door panel thickness 1 3/8" ~1 3/4",The distance from top of the door to the…