... red,green,blue,orange Detailed Product Descriptionconcrete pump cleaning ball it is for cleaning concrete pump pipe model: DN25 to DN 200 ... include steel pipes, rubber hoses, elbows, bends, reducers, couplings, cleaning balls and so on.2. As a supplier of SCHWING ... shotcrete machines.4. OEM available from us.ZHONGLING concrete pump cleaning ball specification:- sponge balls from 2" to 8", soft, ...