Bike Yoke Seat Post Service Parts. Features: Service kit includes wiper, upper bushing, lower bushing, foam ring, and 6 brass keyway pins YB-2122 and YB-2123 include lower tube, upper stanchion bushing, and wiper Note on lower tubes: diameter can be changed between 30.9 and 31.6mm but NOT 34.9mm. Length must stay the same as original Specs: Model:Divine SL Description:service kit V1