Galvalume fast rolling door

The one-piece door panel is made of high-quality color galvanized steel sheet. The steel plate is produced by a qualified manufacturer (Shengyu Sysco) who has a worldwide patent license with aluminum-zinc alloy coating. The structure of the compression-resistant steel plate is perfect, and the bottom layer of the steel plate is immersed and heat-treated, which has strong acid and alkali resistance, corrosion resistance and moisture resistance.