KS eTEN Remote Air Pressure Cartridge - 30.9/31.6mm 100mm travel Externally routed posts. Cartridges fully replace the functional mechanism of KS dropper posts. Pick the model and length of drop for the post you need to service. These are also called "Oil Pressure Sticks" and "Air Pressure Sticks" In KS Service Documentation.

Fully replace the functional mechanism of KS dropper posts

May not work with OEM dropper posts