This product includes :Gearbox Cover-1PCSStainless steel Cap Head Screw 2.5x16-4PCSOriginal name / Part No:AXI2320041. Offer security for front component and back gearbox, support the differential for better performance.Major advantages of upgrading on part/product :1. Designed with outstanding quality steel for great durability and protection. Weighing at 67 grms, this component has good weighing effect.2. tall accuracy the differential to complete a smooth performance.