... brief introduction of our products: we produce and supply concrete pump parts(fitting to Schwing and PM , Sany, Zoomlion,CIFA ... sponge balls:for all kinds of concrete pump pipefittings7.wear plate and cutting ring Fitting to schwing,PM,SANY,Zoomlion,etc ... . Pictures concrete pump sealing rings Everdigm DN150(6'') Concrete Pump rubber gasket