... machining 2)Sandblasting,Galvanized,Cr-plating..etc 3)ISO Certification Ring sprocketModel428 428H 415 420 520 530 etcTeethFront 13T 14T 15T ... , Bubble bag,Color Box, Blister card…… etc Main marketSouth America, Southeast Asia,Africa ,Middle East, North America, EuropePaymentT/T L/CDeliverywithin25 days, ... 8000pcsAny special order is welcomed.Welcome to your inquiry.Jenny13283294813 Ring sprocket