Arrma Kraton BLX Sealed Ball Bearing Kit for RC Cars RC Car Ball Bearing Kit Includes: (10)8x16x5 ..... (2)8x19x6 ..... (4)15x21x4 ..... (2)5x11x4 ..... (4)6x10x3 Kit contains all upgraded bearings to replace your stock factory bearings and bushings. ABEC rated with Chrome Steel balls, Hi-temperature, low drag lubrication. Maintenance free rubber seals to keep the contamination out and the grease in. Complete Ball Bearing Kits are custom packaged for your vehicle. Genuine FastEddy Bearings, The most trusted name in RC Bearings.