Thank you very much for your follows and repeat purchases. If you are not satisfied, we offer a refund or exchange within 30 days of receiving the product, even if it's due to the customer's circumstances. We hope you can purchase with peace of mind. Since the items sell out quickly, we are unable to offer discounts. We appreciate your understanding. As a first-time purchase bonus, we are offering an additional ball service. We also have repeat purchase benefits. Please take advantage of this opportunity. These balls were opened in early December and used for about a month in women's practice on a hard court. They are generally scuffed, but the air pressure decreases over time. Recommended for service practice, ball feeding practice using many balls, etc. We also receive good reviews from those who purchase them for baseball batting practice. We will respond immediately if you purchase directly. 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.