,RockShox Reverb Seatpost Service Kits,- Basic service kit includes collar bushing with sealing o-ring, internal/external damper sealhead and IFP glide bushings and o-rings\n- Full service kit includes basic service kit plus bushing-collar dust wiper, bleed screw and threaded barb (post) attachment with o-rings, tubing strain relief collar, keyway bushings, and complete lower air valve assembly\n- 200 Hour kits include foam rings, inner sealhead bushing and o-rings \n- A1 kit fits Reverb posts with silver remote adjuster knob \n- A2 kit fits Reverb posts with black remote adjuster knob