The product includes :Gearbox Cover-1PCSStainless steel Cap Head Screw 2.5x16-4PCSOriginal name / role No:AXI2320041. Offer security for front component and straight back gearbox, offer the differential for better performance.Major options that come with updating on part/product :1. Beautifully made 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 perform a smooth performance.