Rock Shox Reverb Seatpost Service Parts & Tubing. Features: Remote-lever service kit includes barb attachment o-ring, RSA knob o-ring, bleed screw with o-ring, and height-button piston o-ring Tubing kit includes 2000mm of 'new-design' cut-to-fit Reverb hydraulic tubing, strain relief collar, and threaded attachment barb with sealing o-ring A1 kit fits Reverb posts with silver remote adjuster knob A2 kit fits Reverb posts with black remote adjuster knob *Compatible only with non-Connectamajig (pre-2014) Reverb posts Specs: Description:A2 remote-lever RSA knob kit