Feature:1. Applicable Model: RC car ball bearings are suitable for WLtoys 144001, 144002, 124018, 124019, 124017, 124016, 144010 remote control cars.2. Stainless Steel Materials: The bearings are made of high quality stainless steell materials, which are durable, strong and have a long service life.3. Smooth Surface: This stainless steel RC car ball bearing has a simple and smooth finish that will make your car look like a brand new one.4. Product Size: RC car ball bearing outer diameter is about 7mm / 0.3in, inner diameter is about 4mm / 02in, thickness is about 1.8mm / 0.07in.5. Easy to Install: Our metal bearings are specially designed for remote control vehicles. Multifunctional design, suitable for most RC car body modification.Specification:Item Type: Ball Bearing for Remote Control CarMaterial: Stainless SteelColor: SilverWeight: Approx. 3g / 0.1ozProduct Outer Diameter: Approx. 7mm / 0.3inProduct Inner Diameter: Approx. 4mm / 02inProduct Thickness: Approx. 1.8mm / 0.07inApplicable Model: for WLtoys 144001, 144002, 124018, 124019, 124017, 124016, 144010 Remote Control Cars.Package List:4 x Bearing