KS E30i-75T Air Pressure Cartridge - 75mm Model=Alivio CS-HG400 9-Speed Cassette The grill in the chin

The grill in the chin piece protects the face from mud splashes

This bar is made of lightweight 7050 aluminum

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KS E30i-75T Air Pressure Cartridge - 75mm Model=Alivio CS-HG400 9-Speed Cassette The grill in the chinKS 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