These 12T / 2.4 mm hole Pinion gears are very useful to use as retainers on a 2.5 mm rod.
The white gears with the 2.4 mm dia. hole are a press fit on to the 2.5 mm diameter steel rod.
Available in packs of 10 or packs of 50 (please specify).
Diameter: 7 mm.

NOTE: Plastic pinion gears are press-fit and are not recommended to use Faulhaber motors due to the risk of damage to the motor.