Trimble Water Bottle Cage Adapter: Saddle Rail Mount - 1990's Vintage - Black - Rare
Yep, this is the cult favorite Trimble bike company of the 1990's take on a bottle adapter! These were made for the Brent Trimble Aero TT bike, and were available aftermarket. Fits two standard bottle cages and mounts to your saddle rails.
Excellent used condition. Some very light marks in the finish.