3.1mm Wheel Block: 3.1mm wheel block is suitable for 3mm thick steel wire or wheel shaft Characteristic: Made of high quality material, durable and easy to use, can be used repeatedly without breaking Exquisite Craftsmanship: Exquisite craftsmanship and good performance provide a better gaming experience Suitable for: Suitable for fixed, wing model remote control aircraft, has widely used Good Accessory: A good accessory for remote controlled aircraft that is used to replace old and bad parts Specification: Item Type: Landing Gear Stopper Set Wheel Collar Material: Stainless Steel Product Color: Silver Inner Hole Diameter: Approx. 3.1mm / 0.12in Applicable To: Fixed Wing Model Remote Control Aircraft Package List: 20 x Landing Gear Stopper Set Wheel Collar Note: 1. 1.5 Hex wrench is required for wheel stop installation, please provide your own tools. 2 Due to manual measurement, please allow an error of 13mm. Thank you for your understanding. 3. The calibration of the display is inconsistent, and the color of the items displayed in the photo may be slightly different from the actual object. Please refer to the actual.