Our grooved fittings are made by ductile cast iron. Our company has successfully built up very good reputation by high quality, very many and full kinds, advancing techniques, and sincere service attitude. Our product fully meets American UL and FM standard. The PICC (People's Insurance Company of China) guarantees our products' liabilities for domestic customers. There are more than 700 kinds of grooved fittings types. We have sold them to all over the world, and the customers are very satisfied with them. We have two big sorts of grooved pipe fitting, one is for fire protection pipe system, another is for mine pipe system.