ION Hardened Steel 11T Pinion (for 3.5mm Motor Shaft) - GAUI X3 / X3L

• Made from Hardened Carbon Steel, which means a very durable and long lasting pinion.
• Hardened Carbon Steel will not wear like some of the softer types of steel used for making pinions, this means less wear on your main gear since the pinion teeth will hold their shape longer.
• Better efficiency due to consistent mesh between main gear and pinion.