Hi there! We are consistently trying to declutter and organize 🤣🙂 and in the midst of our last purge I found these.🐾 🐕My girls are a part of the Tennis Ball Club with Barkbox and have received some duplicates. I kept them for awhile thinking the other ones would get cracked or broken down but they aren't tough on them like that, so it's time 🤗 These tennis balls are all brand new and have never been opened. The tennis balls are M-L, 20+ lbs, 10kg. They were also stored in a Rubbermaid container in our closet. Let me know if you have any questions or would like to see any other pictures. 4 or more items gets you 10% off from my closet 🙂😘