Fasteners -Kids Bicycle Hubs Nut Highlights Generic Brand Kids Bicycle Hubs Nut Description: Professional front/rear hub nuts for kids bikes, balance bikes, push bikes Made of aluminum alloy, light weight, high strength and durable. Anodized surface, anti-slip and bright color, corrosion resistant and fashionable. This serves to distribute the pressure of the nut over the part being fastened, reducing the chance of damaging the part and making it less likely to loosen as a result of an uneven fastening surface. Specification: Material: Aluminum Alloy Screw Height: Approx. 8mm / 0.3 inch Screw Outer Diameter: Approx. 17mm / 0.66inch Nut Outer Diameter: Approx. 12.9mm / 0.5inch Inner diameter of nut: about 8mm Package includes: 2 pairs kids bicycle hubs nut Note: Please allow slight difference due to manual measurement. The color may be slightly different since different monitor. THANKS!