Product Description DUCTILE IRON GROOVED RIGID COUPLINGS AND PIPE FITTINGS FOR FIRE FIGHTING SYSTEMS China JUNTONG,Focus on “making production” with spirit of craftsman like reliable,experienced,professional,great HangZhou CHINAMFG Machinery Auxiliaries Co.,Ltd.is established in 2004,Casting from 1997,is a professional manufacturer specialized in the R&D,production,sale and service of ductile iron Grooved Couplings and Pipe Fittings. Located in HangZhou,we enjoy convenient transportation … Continue reading China Professional FM UL Approved Ductile Iron Grooved Rigid Coupling