These are the optional Steel Bevel Gears for the Tamiya TA06 Gear Diff Unit. Fits the Tamiya TA06, XV-01, and FF-03R chassis, and also the #42197 Gear Diff Unit II (TAMC0935) Replaces the stock plastic diff gears Allows car to handle tough driving conditions such as rally driving with a high-powered motor Two Large Steel Bevel Gears Two Small Steel Bevel Gears jxs 01/10/13 ir/jxs &