Description: 100% brand new and high quality Features: DIY Tank Accessories Set of 40 Section Tank Track Conveyor, TT Motor, Driving Wheel and Drive Wheel. Stardard 40 Section Tread. Large plastic tank track, chain-track, great for DIY robot assemly kits, robotics learning. Perfect for All Smart Tank Chassis, and shock absorption designed. Specification: Material: Plastic Color: Black + Yellow Work Voltage: 6V 200mA 20010% rpm 3V 150mA 9010% rpm Driving Wheel: approx. 50x20mm/1.96x0.79inch. Drive Wheel: approx. 20x46mm/0.79x1.81inch. Tank Track Conveyor Length: 18.5cm/7.28inch, Width: Approx 4cm/1.57inch Quantity: 1 set Note: Transition: 1cm=10mm=0.39inch No retail package. Please allow 1-2cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x Tank Track 1 x Motor 1 x Driving Wheel 1 x Drive Wheel(other accessories demo in the picture is not included.)