Features1STEEL MANUFACTURING: The sprockets are made of selected steel, characterized by high toughness and wear proof. This makes the sprockets durable and able to withstand high loads and frequent use. 2PROFESSIONALLY MANUFACTURED: The sprocket wheel is a professionally manufactured accessory that provides stable performance and reliability to meet the demands of electric scooter use. 3PROFESSIONALLY DESIGNED: The sprocket is specially designed for MY1020 high speed motor. It has an inner diameter of 12x17mm, which can ly match for MY1020 high speed motor. 4HIGH PERFORMANCE: As the best accessory for electric scooters, this sprocket can enhance the performance and efficiency of the whole electric scooter. 5RELIABLE: The sprocket remains stable and reliable despite high speed rotation and multiple uses, providing long term reliable operation of the electric scooter.SpecificationItem Type: Engine SprocketMaterial: SteelInner Diameter: Approx. 12x17mm / 0.47x0.67inPackage List5 xEngineSprocket