Ductile Iron Grooved Fitting and Couplings can be produced according to the drawings or samples from customers, we can produce all kinds of grooved fitting parts as per your special requirements, and we have the UL and FM certificates for grooved fittings. We produce all types of ductile iron grooved fittings and couplings UL and FM approvals, welcome the customers all over the world contact us and discuss the good cooperation with us, sincerely hope to be your reliable suppliers.