The RockShox Reverb AXS Service Kit 600-Hour is a complete internal service kit designed specifically for the RockShox Reverb AXS dropper seatpost. Over time and with extended use, internal seals and components can wear, leading to loss of smooth travel, leakage, or inconsistent performance. This service kit contains all of the essential replacement seals and internal parts needed when performing a full rebuild or scheduled maintenance on your Reverb AXS after approximately 600 hours of riding or about 3 years of use, helping restore the post’s factory - smooth operation and durability.