These air shafts are new, but not new at the same time. These were removed from brand new forks and have never been used. We change the travel on Fox forks free of charge for customers who request a travel that Fox does not offer from the factory, so we often have some leftover air shafts from these travel changes. If you&';re looking to change the travel either up or down in your 2021+ Fox Float 36 fork, then just snag an air shaft and swap it out in your fork! The new 2021+ Air Shaft boasts a larger negative air volume chamber. Fox Air Shafts come with brand new seals pre-installed. We have a super in-depth video on Fox lowers service below which shows step-by-step how to pull your fork apart and swap out your air shaft. When you click to view the video it will start at the air shaft removal/swap procedure. Start at the beginning to watch the entire procedure! Fits 2021+ Fox 36 Factory, Performance Elite and Performance forks. Does not fit Fox 36 Rhythm. Sold as-is with no manufacturer warranty NOT backwards compatible with older model years