Features: 1.Metal Material: The chain sprocket is made of metal material with high strength and wear resistance, having good performance for long service life. 2.Easy to Use: Manufactured with accurate size and shape design, has a close fitting, simple for install and removal, saving your time and energy. 3.Warm Prompt: The chain sprocket has 9 tooth, can only be used with the 25H chains. When using, it is necessary to pay attention to whether the model meets the requirements. 4.Application Scope: Ideal replacement for the old or damaged original part, suitable for MY1020 motor engine, providing a higher performance. 5.No Burden: Metal material and small size make sprocket have a light weight, will not increase the burden or cause additional energy waste. Item Type: Motor Sprocket Material: Metal Color: As Picture Shown Application: for MY1020 Motor Engine Product Size: Thickness: Approx.4mm/0.2in, Inner Diameter: Approx.10mm/0.4in, Inner Width: Approx.8.5mm/0.3in Gross Weight: Approx.5g/0.2oz 1 x Motor Sprocket