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UpGrade RC 17028 "Rocket Speed" Rubber Sealed Ceramic Bearing Kit for Tamiya® TT-02™ Track - Bumper Trumpeter Scale Models 6615 1/350UpGrade RC 17028 "Rocket Speed" Rubber Sealed Ceramic Bearing Kit for Tamiya TT 02 The UpGrade RC "Rocket Speed" Rubber Sealed Ceramic Ball Bearings Kit for Tamiya TT 02 platforms. These ceramic rubber sealed bearings provide superior protection against dirt, dust, and moisture, which helps to keep the internal components of the bearing clean and lubricated. This leads to smoother operation, reduced wear, and extended lifespan of the bearings,