1.Only produce mould 2.describe:union ball valve 3.type:single,double,thread,butterfly,brass ball 4.material: ppr, pvc,abs,pp We ... years experience about making double ball valve moulds.union ball valve has seven parts.We can make all kinds of ball valve mould customer's require. The ... PE-RT, POM and other material. Form as thread, socket, male, female, etc.4. We can provide moulds various pipe fitting ...