Accessories:Gearbox Cover-1PCSStainless Steel Cap Head Screw 2.5x16-4PCSOriginal Name / Part No:AXI232004Product major functions & usage:1. Provide protection for front and rear gearbox, stabilize the differential for better performance.Major advantages of upgrading to this part/product :1. Made with a good quality aluminum 6061 T6 for great durability and protection.2. High accuracy for the differential to achieve a smooth performance.