Pro-Line brand Transmission Ball Bearing Kit for the Pro-Line Performance Transmission (PROC6092) for the Traxxas 2WD Slash, Electric Stampede, Bandit, and Rustler. FEATURES: Replaces all ball bearings used in the Performance Transmission YOU WILL RECEIVE: Two 10x16x5mm Ball Bearings Four 5x11x4mm Ball Bearings jxs 09/14/12 ir/jxs