High strength material Made of high quality metal, features high strength and durability, not easy to damage and can be used for a long time.Excellent workmanship Professional manufacturing for high accuracy, perfectly matched model can replace the original parts.Function Differential can make the left and right RC wheels realize the mechanism that rotates at different speeds.High performance Can improve the performance of the RC car and add more fun to your remote control.Delivery Quantity: 1 PiecePackage Contents: Only the above package contents, excluding other products.Size: 4.2*2.8(Reminder: The size is measured manually, please allow 12 cm measurement error)Colour: Black(Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.)