concrete pump pipe cleaning ball for cleaning the pipes. Concrete Pump Cleaning Ball size from 4inch-6inch, soft, medium, and hard available, usding for Schwing, PM, ... pipeline of concrete pump and concrete pump truck in construction workService Brand Schwing, PM, Kyokuto, CIFA, Sany, Zoomlion, and so on 2inch-125inch Concrete Pump Pipe Cleaning ...