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