... from 1''-8'', soft, medium, and hard available, usding for Schwing, PM, Kyokuto, Cifa, Sany, NameConcrete Pump Cleaning BallsizeDN25(1inch) soft ,hard ,medium softDN50(2inch) soft ,hard ... (3 inch) soft ,hard ,medium softDN100(4 inch) soft ,hard ,medium soft DN125(5 inch) soft ,hard ,medium soft DN150(6 inch) soft ,hard ,medium softDN180(7inch) soft ,hard ,medium softDN200(8inch) soft ,hard ,medium ...