This strong steel 13T Straight-Cut Main Input Gear is the perfect part to carry in your RC tool box.Features:Constructed from hard-wearing steel for long-lasting durability and consistent performance - Straight-cut tooth profile - 13 precision manufactured gear teeth for smooth operation in extreme RC conditions - Uses ARRMA Safe-D keyed fit to Input Shaft Cup and composite sleeve for a more secure fitIncludes:1 x Main Input Gear 13T Straight CutRequires:To be used with main diff gear #AR310441 and #ARA310976 and #ARA310977