Hiwonder Tank Car Chassis Kit Shock Absorbing Robot with DC Geared Motor for Arduino/ Raspberry Pi/ Jetson Nano DIY Robotic Car Learning Kit (Black)Product Description Tracked chassis adopts an all metal aluminum alloy structure, which is strong and stable and can adapt to various complex terrains. Its chassis panel contains multiple expansion holes for installing controllers and sensors. Loaded with high performance motors, the tank chassis can smoothly turn left, right, circle, forward and backward, etc. There are black and green chassis kits for your choice to complete your DIY project.