- 2 Pieces premium stainless steel bicycle wheel axle flange nut, lightweight high strength, and durable - wheel requires two nuts and a flange nut has a wide flange at end that acts as an integrated, non- washer - It serves to distribute the pressure of the nut over the part being secured, reducing the chance of damage to the part and making it less likely to loosen as a result of an uneven fastening surface - Universal for rear wheels on many bikes - Mountain road bike, track bike, fixed gear DIY modified accessories - Great replacement gear accessories for bike cycling enthusiasts Specification: - Material: Stainless steel - Inner Diameter: Approx. 9 mm/0.35 inch - Color: Silver - Quantity: 2 Pieces Package Includes: 2 Pieces Bicycle Wheel Axle Nut Note: Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor. Thanks!