Ritchey Di-2 Internal Battery Mount
-brand new in original packaging - These are battery mounts for either 27.2 or 31.8 mm seatposts. -enables Di-2 battery to be securely stored in seatpost -PRD 18813 suits 27.2mm Seatpost SOLD OUT -PRD 18814 suits oversize 30.9 - 31.8mm Seat post