These are the planetary gears for the Autohelm MK2 ST4000 motor gearbox. The gearbox contains a total of 9 gears. These are 3D laser printed in nylon plastic for exemplary durability.
These gears are for the Mark 2 (MK2) GREY wheel Autohelm ST4000 - they DO NOT fit the Black Mark I wheel.
Download the installation instructions for the gears
here.