Internal components for servicing the Reverb and Reverb Stealth mechanism.

• Seals the upper tube from the inner shaft as it cycles
• Fits A1-A2 generation externally routed Reverb seatposts
• For "A1" designated posts, 2010-2012
• A1 posts have a silver return speed adjuster on the remote and no laser etched logos on stanchion by the saddle cradle
• For "A2" designated posts, 2013-2016
• A2 posts have a black return speed adjuster on the remote and no laser etched logos on stanchion by the saddle cradle