This is the Transmission Diff and Idler Gear Set for the Pro-Line Performance Transmission (PROC6092) for the Traxxas 2WD Slash, Electric Stampede, Bandit, and Rustler. FEATURES: Steel and composite construction INCLUDES: Diff Housing, Idler Gear, Pin, two Spacers and four Screws jxs 09/13/12 ir/jxs