Concrete Pump Piston RAM include Schwing, Putzmeister, Kyokuto, Sany, IHI. DN180 DN200 DN230 DN250 ... .MaterialPolyurethane,Natural rubberApplicationUsed in concrete pump truck, concrete pump, hydraulic ram system in Construction work equipmentService brandsSchwing, PM, Kyokuto, CIFA , Zoomlion ...