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 if it is due to your convenience. We hope you can purchase with peace of mind. As an initial bonus, we are offering an additional ball service. 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 a women's practice session with a hard court. As you can see in the image, the felt has some scuffing. Also, the air pressure will decrease slightly over time. These are recommended for service practice or for practice sessions where many balls are used. 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 about 200 balls in stock. If you purchase a large quantity, we will offer a significant discount, so please contact us before purchasing ♪