Thank you very much for your many follows and repeat purchases. In the unlikely event that you are not satisfied, we will offer a refund or exchange within 30 days of product arrival, even for reasons of customer convenience. We hope you can purchase with peace of mind. As a special introductory offer, we are providing an additional service of balls. We also have repeat customer benefits. Please take this opportunity to use our services. These are balls that were opened in early January and used for one week in women's practice on an omni court. As you can see in the images, the felt has some scuffing. The air pressure has also decreased slightly, but they are recommended for service practice and drills that use a lot of balls. We believe they can be widely used by children, women, and adults, as well as by beginners and intermediate players. We will respond promptly even if you purchase immediately. We have approximately 200 balls in stock. If you purchase a large quantity, we will offer a significant discount, so please contact us before purchasing ♪