Concrete Pump Reducer:6''-5'', 5"- 4'', 4''-3'', 3''-2'', 4''-2'' Inner Wall Harden,Normal Flange Available, Boom/Line Reducer NameConcrete Pump ReducerSize6-5 ... and non-harden, or according to clients requirementTechnicalFrequence heatedApplicationUsed in Concrete pump outlet in Construction workServing brandsSchwing, PM, CIFA , Kyokuto, Sany, Zoomlion ...