ONEUP COMPONENTS DROPPER POST CARTRIDGEONEUP YOUR RIDEUnfortunately, nothing lasts forever. Even the most durable components will wear out eventually with regular use. Luckily, there are replacement parts so you can get back to riding without buying an entirely new component. The One Up Components Dropper Post Cartridge is designed for the new One Up Components V2 Dropper Seatpost. It is available in multiple lengths depending on which length seatpost you own. Features Replacement cartridge for the One Up Components V2 Dropper Post Available in multiple lengths depending on the size you have | Oneup Components | Dropper Post Cartridge Kit, 120Mm