This accessory kit includes bearing washers, axle nuts, and speed ring washers, designed specifically for standard 8mm wheel hub axles. This comprehensive kit contains 16 bearing washers, 8 axle nuts, and 32 speed rings—a total of 56 parts—covering everything needed for wheel and bearing installation or replacement. The ample quantity makes it convenient to maintain multiple skateboards or to stock spare parts for future maintenance needs. The 16 bearing washers are precision-machined to a tolerance of +/-0.02mm, ensuring a tight fit between the two bearings inside each wheel. When properly installed, the appropriately sized washers allow you to fully tighten the axle nuts without jamming the bearings against the hub. This eliminates lateral wheel wobble while allowing the bearings to rotate freely, reducing friction and extending bearing life. They won't be crushed or deformed even under the pressure of tightening the axle nuts, maintaining consistent performance even after multiple wheel replacements. The 8 axle nuts use standard 5/16-inch threads, compatible with most skateboards and longboard brackets using 8mm axles. The nut is made of iron and coated with a black protective layer to effectively prevent corrosion from moisture and road debris. Its design allows it to be securely tightened onto the speed ring and bearing inner race, preventing the wheel from loosening during riding.