RCATM 2 sets Differential Gears for Axial SCX24 Steel Gears 2/16T Package: 2 set weight: 10g Using CNC numerical control technology, durable, perfect and must be used by the original factory, effectively improve the performance of the car Made of metal steel, smooth and durable, easy to install (professional testing, please rest assured 100%) Customer service: If you have any question,please contact us FIRST and we will offer professional service to solve your problem.