KS E30i-75T Air Pressure Cartridge - 75mm Model=Alivio CS-HG400 9-Speed Cassette 6mm Cool Gray

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KS E30i-75T Air Pressure Cartridge - 75mm Model=Alivio CS-HG400 9-Speed Cassette 6mm Cool GrayKS E30i 75T Air Pressure Cartridge 75mm. 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