Description: 100% brand new CNC High precision Processing Built-in metar gear Easy installation Commonly used for 6 drive: Q64, Q60, FY004, B-36, MN-77 Specification: Material: Metal Size: 132 x 51mm / 5.2 x 2inch Package Includes: 1pc RC Car Middle Axle Differential Note: Upgrade accessories. If your product is of another brand, it is not guaranteed to be applicable. Please check if the parameters are appropriate before ordering. Thank you!