ST52 Concrete Pump Placement Pipe with SK Flange Material:ST52, 45Mn2, 20#,Q235 ... .0148mmChrome Carbide insertSchwing,Putzmeister, CIFA, Kyokuto, SanyZX-Pipe(ST52)Harden ZX-Pipe1257.0ZX-5 inchF/M FlangesPutzmeisterHigh ... Pressure1257.0ZX-5 inchF/M FlangesPutzmeisterSchwing F/M pipe(ST52)1254.0Schwing 5inchF/M FlangesSchwing High ... MOthersproduct picture: ST52 Concrete Pump Placement Pipe with SK Flange