The Tennis Ball Saver is the original way to keep your tennis balls fresh and bouncy. The bane of tennis ball companies for over thirty years, the Tennis Ball Saver can keep three tennis balls bouncing like they were brand new. The reason tennis ball containers are pressurized is so that no air will affect the integrity of the balls inside. Tennis Ball Savers work under the same principle, and by keeping the balls at the correct pressure, will protect tennis balls from natural leakage that occurs. As long as the felt on the tennis ball stays in good condition, tennis balls will keep on bouncing true! Buy the Tennis Ball Saver - this simple investment will make all your future tennis balls remain bouncy in the future. Remember this is a pre-owned item so please ask any questions prior to bidding and good luck!! I ship to the contiguous U.S. states and international shipping (Confirmed Paypal addresses only), no P.O./A.P.O/F.P.O International Buyers: I do ship internationally using the Global Shipping Program International Buyers - Please Note: Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyer's responsibility. Please check with your country's customs office to determine what these additional costs will be prior to bidding or buying. Buyers please remember items sent internationally can take anywhere from 2-7 weeks for delivery I Will ship within 2-3 business days of receiving clear payment 100 Percent Customer Satisfaction is our goal! Please contact me with any issues and thank you for looking!!