... .type:single,double,thread,butterfly,brass ball 4.material: ppr, pvc,abs,pp We are expert in producing plastic valve and pipe fitting moulds ... .We have more than 15 years experience about making double ... , flexible connector, water supply and sewerage pipe fitting moulds, etc. made of ABS, U-PVC, C-PVC, PP-R, PE, PE-RT, POM ...