... enamel technology. Our products with high quality and high-grade iron ore natural enamel as raw materials, it adopted traditional ... orchestrated "Yi Yun" brand sanitary products. Annual output of cast iron enamel bathtub, cast iron enamel shower base, blank, single and double sink, ... by the customers all of the world. "Yi Yun" iron bathtub was the porcelain with bright and smooth surface, beautiful ...