Item Type:Motor SprocketMaterial: MetalProduct Size: Approx.Tooth Thickness: 4mm / 0.16inInner Diameter: 10mm / 0.4inInner Diameter Width: 8.5mm / 0.3in .wang-edit-text{ font-family:'Arial' important; } .wang-edit-text table { border-top: 1px solid 000; border-left: 1px solid 000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid 000; border-right: 1px solid 000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; } 1Applicability: Can only be used with T8F chain, it is suitable for many electric scooter motors. 2Professional Manufacturing: Easy installation, stable performance and high reliability. 3Metal Material: The sprocket is made of high quality metal material, durable and practical. 4Portable: 9T sprockets are light in weight, compact in size, easy to install, easy to use and not easy to break. 5Replacement: 9T sprockets are the perfect replacement for old or broken sprockets, direct mount.