Feature:1. Applicable: This sprocket has 13 teeth and can only be used with 25h chain, suitable for MY1020 motor.2. Metal Material: Made of high quality metal material, durable and practical, not easy to break.3. Easy to Install: Professional manufacture, easy installation, stable performance and high reliability.4. Replacement: 13T sprockets are the perfect replacement for old or broken sprockets, direct mount.5. Portable: The bicycle 13T sprocket is light in weight, small in size, easy to install and easy to use.Specification:Item Type: Motor SprocketMaterial: MetalProduct Size: Approx.Tooth Thickness: 4mm / 0.16inInner Diameter: 10mm / 0.4inInner Diameter Width: 8.5mm / 0.3in Package List:1 x Motor Sprocket