Feature:1. Manufacturing Material: Made of high quality silicone material, waterproof, oil resistant, corrosion resistant, which undoubtedly extends its service life.2. Exquisite Workmanship: Exquisite workmanship, super light and practical, and can be used as an ornament.3. Outer Diameter of Inner Tube: The outer diameter of the inner tube of the front fork includes 32mm / 1.3in, 34mm / 1.3in, 35mm / 1.4in and 36mm / 1.4in.4. Simple Operation: Simple to operate, easy to use, easy to install and disassemble.5. Ideal Fitting: It can replace damaged or old parts of the bike and improve the performance of the remote control car.Specification:Item Type: Mountain Bike Seal Oil RingWeight: Approx.5g / 0.2ozMaterial: SiliconeFitting Outer Diameter Of Inner Tube Of Front Fork: Approx.32mm 1.3in, Approx.34mm / 1.3in, Approx.35mm / 1.4in, Approx.36mm / 1.4in.Package List:5 x O Ring