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 ,medium softDN50(2inch) soft ,hard ,medium ... , Zoomlion, and so on DN125 Soft/Medium/Harden Concrete Pump Cleaning Rubber Ball