Concrete Pump Piston include Schwing, Putzmeister, Kyokuto, Sany, IHI. DN180 DN200 DN230 DN250 NameConcrete Pump PistonSizeSCHWING: DN180/200/230/250PM : DN180/ ... 200/230/250KYOKUTO: DN230/225/205CIFA: DN178/DN200/DN230ELBA: DN200/230ZOOMLION: DN180/200/220/230SANY: DN180/195/200/230/260 ... , CIFA , Zoomlion, Sany, and so on Schwing Pump Piston Ram DN200