concrete pump snap coupling 1.product: snap coupling 2.spec: 3'' 1/2 3.weight: 2.6KG Concrete Pump Coupling SCHWING, SANY, ZOOMLION SUPPLIER PIPE CLAMP SNAP COUPLINGConcrete Pump Coupling- snap coupling1. We are a professional manufacturer of concrete pump couplings in China. Our products include delivery pipes, elbows, reducers, couplings, rubber hoses, cleaning balls and so on.2. Our products ...