Feature:1. Applicable Models: This ball bearing kit is designed to fit for Traxxas TRX4M 1/18 remote control crawler cars, can match perfectly with the model.2. Stainless Steel Material: The RC car deep groove ball bearings are made of premium stainless steel, not easy to corrosion, wear proof, long service life.3. Great Performance: The car ball bearing is light in weight, with small friction and fast speed, can help to improve the performance of remote control car, more fun for you.4. Precise Workmanship: Special non contact double rubber sealing can prevent the dust from entry, let the car run smoothly and facilitate your daily maintenance.5. Perfect Replacement: The original RC car ball bearing parts or damaged parts can be replaced directly, with higher strength, easy to install and replace.Specification:Item Type: RC Car Bearing KitMaterial: Stainless steelWeight: Approx. 15g/0.5ozBearing Size: Approx. 3x6x2.5mm/0.12x0.24x0.1in, 8pcsApprox. 4x8x3mm/0.16x0.31x0.12in, 4pcsApprox. 3.5x7x2.5mm/0.14x0.28x0.1in, 4pcsApprox. 5x8x2.5mm/0.2x0.31x0.1in, 4pcsApprox. 8x12x3.5mm/0.31x0.47x0.14in, 2pcsApplication: Suitable for Traxxas TRX4M 1/18 RC crawler cars.Package List:22 x RC BearingsNote:1. Due to manual measurement, 1 to 3mm error is allowed, thank you!2. The picture may not reflect the actual color of the item due to differences between different displays.