Fox Open Valve Tool The Right Tool for Transfer Service Servicing a Transfer dropper post correctly means having the right tools on the bench. This dedicated service tool handles two critical steps in the rebuild process: holding the spool valve open during oil fill and bleeding, and serving as the nitrogen fill interface when charging the IFP. It fits the Transfer post shaft directly and keeps the valve open so you can cycle the shaft and purge air without improvising a workaround. If you do your own suspension service, this is the tool that makes Transfer rebuilds go the way they are supposed to go. Features Open valve function holds the Transfer spool valve open during oil fill and air purge cycles Nitrogen fill interface attaches to the shaft end to support IFP charging during Transfer post rebuilds Transfer post compatibility fits Fox Transfer seatpost models across internal and external routing configurations OEM part number 398-00-735 matches Fox service documentation for precise tool verification | Fox Racing Shox | Open Valve Tool 2018-2024 Transfer Dropper Seatpost Nitrogen Fill