Air piston shaft assembly only (mnimum required part to adjust travel on 2013+ Reba, Sid-B, Revelation, Pike, Yari and Lyrik SoloAir forks). Does not include top cap, top out bumper, negative air assembly, wavy washer or stanchion c-clip. For complete SoloAir assemblies see Air Spring Kits . Not compatible with Dual Air forks