concrete pump ram piston 1. model : Putzmeister: DN230 2. Material: Polyurethane / Rubber 3. can supply other brand and mode Concrete Pump Accessories-PM Concrete Pump Ram Piston we are specialized in manufacturing concrete pump wear parts for concrete pumps, including Sany, Zoomlion, Putzmeister,Schwing, Kyokuto,etc. Our products mainly include spectacle wear plate and cutting ring, s-pipe, ...