Store three tennis balls according to pressure stretch for all kinds of matching Quality workmanship Keep a good ball, not suitable for rejuvination necrotic balls Tennis protection is the way to make your tennis ball cool and resilient. Tennis's Bain tennis protection for more than 30 years has allowed three tennis bounces to be as brand . The reason the tennis container is pressurized, the air inside will not affect the integrity of the ball. Tennis savers work on the same principle and will prevent the natural leakage of the tennis ball by keeping the ball under the correct pressure. Just as the tennis ball on the felt felt is intact, the tennis ball will make the bounce come true! Buy this tennis saver - this simple investment will keep all your future tennis elastic in the future. This will only make fresh and fresh, not used to be able to necrotic. Color: orange + black Material: Add fiber imported plastic Size: 200 x 85MM Package Contents: 2 x Tennis protection program Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.