RockShox ZEB Silver Seal Head Upgrade Kit Description: This RockShox ZEB Silver Seal Head Upgrade Kit allows users to improve initial support and confidence within RockShox ZEB forks equipped with DebonAir C1 internals. Air piston positioning has been changed relative to the dimple, increasing the ride height from top-out to sag. Increasing the initial support allows every millimeter of travel available to stay on top of the terrain. Features: Genuine RockShox replacement parts DebonAir C1 Seal Head Upgrade Kit for ZEB suspension forks Includes seal head & specific nut Specifications: Model Compatibility: 2021+ RockShox ZEB (A1+)