You can know the specifications of the reducer sleeve. CNC machining surface anodizing.
MTB Bicycle Bike Seat Post Shim Tube Sleeve Reducer Seatpost Converter Adapter .
MTB Bicycle Bike Seat Post Shim Tube Sleeve Reducer Seatpost Converter Adapter
HQ MTB Bicycle Bike Seat Post Shim Tube Sleeve Reducer Seatpost Convert Adapter
MTB Bicycle Bike Seat Post Shim Tube Sleeve Reducer Seatpost Converter Adapters
