Concrete pump cleaning ball Tt is for cleaning concrete pump pipe model: DN25 to DN 200 concrete sponge cleaning ball1.Model Number 5" 2.Anti-corrosive, not easy to distort, not easy to embrittlement 3.Our parts can be used on SCHWING, PM, ANY, ZOOMLION, and etc 4.OEM available from us. DN125 CONCRETE PUMP SPONGE BALL