Zheng Zhong Enamel(***** ), which produce enameled cast iron bathtub , kitchen sinks, lavatory etc. Compared with other supplier, we have following advantage: * 20 years of enamel experience * have our own enamel frit production * have our own casting(foundry) include vacuum casting and hard-casting * have two kinds of furnacing include natural gas and coal gas for more widely style of products.