This is a Longer version of two wheel drive double-layer smart car chassis. It comes with the two pairs of Geared Motors and Wheels. All the products included in this car kit are quality products. The chassis used in this kit is transparent to create dynamic handling of the components mounted on your robotic vehicle. The kit has 1 chassis, 2 BO motor, 2 Wheel, 1 Castor Wheel, Screws and battery case.