1.Only produce mould 2.describe:union ball valve 3.type:single,double,thread,butterfly,brass ball 4.material: ppr, pvc,abs,pp ... have more than 15 years experience about making double ball valve moulds.union ball valve has seven parts.We can make all kinds of ... various pipe fitting of elbow, coupling, tee, reduce, cap, union, flange, flexible connector, water supply and sewerage pipe fitting moulds, etc ...