RockShox Air Valve Core Kit Description: RockShox Air Valve kits include two valve cores intended for use with select RockShox forks, rear shocks, and Reverb dropper seatposts. Note: 2-Step top caps do not include adjuster knob Features: Genuine replacement RockShox parts Schrader valve cores for administration of air pressure For (non U-Turn) fixed-travel coil and air spring fork models Specifications: Model: Rock Shox air forks/shocks/Reverb dropper seatpost Description: Schrader valve core (pair)