BR: Base Ring, Sold and Double-Strip
Base rings form the foundation of any thread cover. The flange on the ring fits the ID of the carbon tube or Cork/EVA cover to secure and center the assembly.
For Seat:
Solid Color - KSKSS/ASH17, PTSK/ASH17
Double Stripe - KSKSS/ASH17, TVSK/ASH17, PTSK/ASH17