... forged High frequency quenching,Carburization Sandblasting,Galvanized,Cr-plating..etc motorcycle Sprocket and chain1) Material:45# steel,16 # Mn ... High frenquency quenching,Carburization6) Surface treatment:Sandblasting,Galvanized,Cr-plating..etc7)packaging,plastic bag to case ,then ... quality guatantee with competetive price.Expecting your contact and visit us for more information!Our main sprockets ...