... --57T 2. Heat treatment. 3.Certification:ISO9001 Color zinc plated Motorcycle sprocket Material: A3 steel, 45# steelSpecificationsModel:415,420,428,428H ... price, durable in use, fast delivery, professional manufacturer Types Honda:C50, MB50, C70, CD70, DAX70, MB80, C90, CD90, S90, H100, C100 ... , RS125, SR125, TW125, TZR125, YB125, XT125, YBR125 Color zinc plated Motorcycle sprocket