【Durable Material 】Universal M0.6 pinion gear,surface hardened. pinion Gear is made of durable Aluminum 7075 for long-lasting performance.
【M0.6】Tthe 13T 14T 15T 16T 17T is the number of teeth on the pinion gear,please make sure your spur gear and pinion gear have the same pitch, otherwise the teeth won't mesh.
【3.175mm Bore】The pinion gear shaft diameter or bore is 3.175mm, fit for 3.175mm Shaft Size Motors, please make sure your RC motor shaft have the same diameter.
【Gear Combo Set With Screws】Each pinion gear with one screws,the pinion gear combo set also included a screwdriver,easy to install.