... fine bubble diffuser; 2.We have made many water treatment part moulds; 3.High quality; 4.Good service ... factory good at making fine bubble diffuser part moulds.We have more than 16 years ... bottom valves, gate valves, locking valves, deflation valves, water tapes, etc., made of ABS, U-PVC, C- ... tee, reduce, cap, union, flange, flexible connector, water supply and sewerage pipe fitting moulds, etc. made of ...