Concrete Pump Spare Parts: Fitting Ring/Intermidate Ring Better Price, Better ... Carbide Base----Zhuzhou City, are specialized in manufacturing concrete pump wear parts for concrete pumps, including Sany, Zoomlion, Putzmeister,Schwing, Kyokuto ... etc 3. other concrete pump spare parts: delivery Pipe(both normal and hardened) , elbow(welding& casting), reducer, rubber seal, pistons,coupling, intermiate ...