Schwing DN80 Concrete Pump pipe Cleaning Balll size from 1inch-8inch, soft, medium, and hard available, usding for Schwing, PM, NameConcrete Pump Cleaning BallsizeDN25(1inch) soft ,hard ... pipeline of concrete pump and concrete pump truck in construction workService Brand Schwing, PM, Kyokuto, CIFA, Sany, Zoomlion, and so on Schwing DN80 Concrete Pump pipe Cleaning Balll