Well, this was the first attempt at a suspension seatpost Mine was like hard rubber, but I may be confusing it with the 'ANPI' fdistributed by Mel Pinto Imports in the 70's
While traveling through Rock Creek park one day on a tandem with an employee, I looked back after hitting a small lump in the road to check on her. I asked why she was standing??!! Well, I looked back a little farther and saw the seat and part of the post .
Larry Black