["Description:\nbrand new and high quality\nFeatures:\nDIY for Tank Accessories Set of 40 Section for Tank Track Conveyor, TT Motor, Driving Wheel and Drive Wheel.\nStardard 40 Section Tread.\nLarge plastic for tank track, chain-track, great for DIY robot assemly kits, robotics learning.\nPerfect for All for Smart for Tank Chassis, and shock absorption designed.\n\nSpecification:\nMaterial: Plastic\nColor: Black + Yellow\nWork Voltage: 6V ≤200mA 200±10% rpm 3V ≤150mA 90±10% rpm\nDriving Wheel: approx. 50x20mm/1.96x0.79inch.\nDrive Wheel: approx. 20x46mm/0.79x1.81inch.\nfor Tank Track Conveyor Length: 18.5cm/7.28inch, Width: Approx 4cm/1.57inch\nQuantity: 1 set\nNote:\nTransition: 1cm=10mm=0.39inch\nNo retail package.\nPlease allow 1-2cm error due to manual measurement. pls make sure you do not mind before you bid.\nDue to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!\n\nPackage includes:\n1 x for Tank Track\n1 x Motor\n1 x Driving Wheel\n1 x Drive Wheel(other accessories demo in the picture is not included.)"]