Fox Racing Shox suspension is some of the best in the world, but any suspension system only works as well as its seals are holding up! Old seals diminish performance and can introduce dirt and grit into your suspension internals that can cause damage and premature wear. Keep your shocks working good as new ones with genuine Fox seals direct from the factory! Fox Float recommends a service interval of every 8 hours of usage in wet/muddy conditions to every 40 hours in dry, dusty conditions for peak performance and longevity. These Fox Shox air sleeve kits are for use with and are compatible with all the Fox Float (air-sprung) rear shocks (RP23, RP3, RP2, R, RL, CTD, etc). Included in the kit are a variety of seals and stanchion bushings to fit different models of shocks.