Most GY-6 Engine 150CC ATVs Go Karts and Scooters package include:1 * Belt High quality replacement parts. Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm) We provide clear pictures, measurements where possible. Please compare its appearance, shape and size with your original unit and make sure that it can fit your machine before ordering. Product Description Description: Most GY-6 Engine 150CC ATVs Go Karts and Scooters 1 * Belt Size:835*20*30