This is the Tamiya 53665 TT01 Spur Gear Set 55t & 58t

Tamiya brand TT01 spur gear set (suits all models of Tamiya TT01). Includes 2 spur gears 55t, & 58t and gearing chart. For use with all TT-01 chassis cars equipped with AV (the large 0.6 pitch Tamiya- original equipment ) pitch pinion gears. Suit TT01, TT01D, TT01E, TT01R, DF02 and 1:14th TT01E Racing Trucks.

Tamiya quality gears for good mesh, quiet running and long life

Gears supplied are new in original manufactures packing, as per pictures