Mountain bikers love our dropper posts, But they are in direct line of fire from mud and trail debree picked up from the rear tire.
Mount this to the exposed shaft of you dropper post and keep the worst of the muck from hitting the seat post prolonging the stantions anodising and seals. Designed to provide maximum protection while still allowing clearance for the saddle to go through all its travel.

Made to Fit 34.9 dropper post lower shaft

Will need (2) M4x30 SHCS https://www.mcmaster.com/91292A130/ (2) M4 Nuts https://www.mcmaster.com/91828A231/