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. ... .6. In a variety of designs.7. Small order accepted.standard: BS, ANSI, DIN, JIS, socket, thread, order, quality, size, ...