Xu Liyuan 13820022223 products are hot-dip galvanized, with a service life of 20-50 and no rust. The company's annual production and sales: 4-10 inch galvanized pipe, high-frequency welded pipe, hot galvanized pipe, greenhouse pipe, galvanized greenhouse pipe, hot galvanized greenhouse pipe, Niutou brand greenhouse pipe. "Tianjin, China"*