This Diff Gear Set provides ideal replacement parts for your ARRMA vehicleFeatures:Durable steel gears to withstand extreme RC action - Precision manufactured gear teeth for accurate gear mesh and consistent performance in all conditions - Strong steel cross shafts for long-lasting durability and efficient running at high speeds - To be used in 29mm diff cases - Can be used in limited slip and open diff buildsIncludes:4 x 10T Satellite Gears 2 x 20T Planetary Gears 2 x Metal Cross ShaftsRequires:To be used with 29mm diff case differentials