Front Engine 420# 428# 520# 530# 17mm 20mm Chain Sprocket Retainer Plate Locker Gasket Screw

High-concerned chemical : None Special Features : good Item Diameter : 1inch Item Weight : 0.03kg Item Height : 1inch Item Width : 1inch Item Length : 1inch External Testing Certification : ISO9000 Model Name : 20mm-17mm Brand Name : HTBCCHB Origin : Mainland China Item Type : Sprockets Material : metal