Isolator's shim-based, spring-backed Internal Floating Piston (IFP) is designed to give riders a consistent and predictable feel throughout travel. Isolator offers a three-position Compression damping adjustment: a plush Open to absorb big impacts, a supportive Pedal without harshness on successive hits, and a watt-saving Firm for the maximum damping force to calm bobbing for the most efficient ride.Includes full right-side internals and controlsCompatible Reba RL B1 (2026+) 3-Position crown typeFor use with RockShox model: FS-REBA-GLD-B1 RockShox Isolator RL Damper Upgrade Kit Damper, Compression UPC: 710845923715