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 Kit Material: Stainless steel Weight: Approx. 15g/0.5oz Bearing Size: Approx. 3x6x2.5mm/0.12x0.24x0.1in, 8pcs Approx. 4x8x3mm/0.16x0.31x0.12in, 4pcs Approx. 3.5x7x2.5mm/0.14x0.28x0.1in, 4pcs Approx. 5x8x2.5mm/0.2x0.31x0.1in, 4pcs Approx. 8x12x3.5mm/0.31x0.47x0.14in, 2pcs Application: Suitable for Traxxas TRX4M 1/18 RC crawler cars. Package List: 22 x RC Bearings Note: 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.