It uses high-quality aluminum, copper and ABS material, the kit is durable and has a long service life. The brushless hub motor can be noise-free during operation, allowing you to fully enjoy the fun of riding. With high strength and high efficiency, it can greatly improve the fun of riding and is suitable for cyclists who like challenges. 5 spoke sizes of 20-28 inches can be selected, it is easy to operate, and equipped with a display meter to display data. Suitable for DIY electric bicycles, the kit will make your ordinary bicycles become electric bicycles. Item Type: Electric Bicycle Conversion Kit Material: Aluminum + Copper + ABS Product Color: As Pictures Shown Controller Box Size: Approx. 12.7×6.6x4cm / 5.0×2.6×1.6in Product Weight: Approx. 1 x Pair of Brake Lever. 1 x Speed Assist Sensor. 1 x Motor Wire. 1 x Instrument Manual. 1 x Spoke Installation Tool. Our listing price includes the value of goods, packaging cost, and export. Please check with your country’s. We will reply your message within 48 hours. If you are satisfied with our service, pls. Our aim is to provide Level Customer Service, your recognition will encourage us greatly and serve you better. We strive to keep all our customers satisfy. We will do our up most to exceed your expectations in customer service, communication and dispatching of your orders.