Thank you for viewing. This is a set of 3 air conditioner cleaning sprays. * 2 bottles made by Earth Corporation (fragrance-free), purchased in 2025 * 1 bottle made by Kobayashi Pharmaceutical (no fragrance ingredients), purchased at an unknown date, but unused (rust on the bottle). I think it's probably usable, but it's uncertain. I don't plan to use them, so please consider using them. Thank you for your consideration.