Bought & never used so new.
Bike Seat Post Reduser Adapter Seat Post Tube Sleeve Bike Seat Post Shim UK
KREMORV Bike Seat Post Shim Bicycle Seat Post Tube Adapter Aluminum Alloy Seatpost Reducing Sleeve for Mountain Bike Road Bike MTB BMX
Bicycle Seatpost Sleeve Road Bike Seat Post Shim Post Tube Adapter
Bicycle Seatpost Sleeve Road Bike Seat Post Shim 22.2-36 Post Tube Adapter UK
HOTMNTY Aluminium Mountain Bike Seat Post Shim, 100 mm, 27.2 mm - 30.9 mm
