RockShox Reverb Seatpost Service Kits. Features: Basic service kit includes collar bushing with sealing o-ring, internal/external damper sealhead and IFP glide bushings and o-rings 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 200 Hour kits include foam rings, inner sealhead bushing and o-rings A1 kit fits Reverb posts with silver remote adjuster knob A2 kit fits Reverb posts with black remote adjuster knob Specs: Model:Reverb AXS XPLR, 27.2mm (A1) Description:600h/3 year service kit