This high-quality 42T GP5 Main Diff Gear is the perfect part to carry in your RC tool box.Features:Machined from strong steel for long-lasting durability and consistent performance - Straight-cut tooth profile - 42 precision manufactured gear teeth for smooth operation in extreme RC conditions - GP5 (gear profile) configuration to be used with GP5 Main Input Gear - Fits on #AR310433Includes:1 x Main Diff Gear 42T Straight Cut GP5Requires:To be paired with #ARA311016 Fits on #AR310433