My understanding is this shock was made by Rock Shox, model FUTURE for Specialized. I'm guessing I only need the rubber insert for the air neddle and the "O" ring that goes around the aluminum cap. It won't hold air in the right shock and a very slow leak of air in the left shock. There is a plastic duster cap, snap ring at the top, a aluminum plunger with a rubber insert to push the air needle in. If someone could explain how to post photo's I would oblige. Thanks for answering my post.