Raw material: QT400-15 .QT450-10 .QT500-7 Surface: Plain Our competitive products:Screw spike: ss5, ss8, ss25, ss36 Rail joint bar: AREMA 115RE, 136RE, UIC54, UIC60, TJ45, TJ57, and BS60, BS75Tie plate: Cast AREMA Rail tie plates and UIC standard sole plateRailway bolt: T bolt, HS Clip Bolt, Track bolt, Hex boltElastic Rail Clips: E1609, E1809, E2005, E2007, E2055, SKL1, SKL3, SKL12, SKL14Dog ...