Features1Applicable Motor: 9T chain sprocket is exquisite in workmanship, suitable for MY1016Z2, MY1016Z3, MY1018 geared motors. 2Carbon Steel Material: Bike chain sprocket is made of carbon steel material, it is not easy to change color or rust, it is not easy to break after repeated use, and it is wear resistant and durable. 3Well Made: High accuracy internal thread, to ensure a tight connection with the bike hub and stable operation. 4Easy Installation: Motor sprocket is easy to install, has high reliability, is convenient and fast to use, and has stable performance. 5 Replacement: Replace broken, damaged, cracked, unusable sprockets, replacement for the original product, lightweight and portableSpecificationItem Type:9ToothSprocketMaterial: Carbon SteelSize: Approx. 11 x 41mm / 0.4 x 1.6inPackage List1 x9ToothSprocket