Feature: 1. Made of high quality fiber reinforced plastic material, which is strong and durable in use. 2. Lightweight, compact, portable and easy to carry, suitable for tennis lovers. 3. Tennis ball pressure holding repair box, it's a good way to protect your tennis ball. 4. While closing the cap, screw the bottle on to a pressure of 14psi and let sit for approximately 24 hours. 5. The pressure of the tennis ball is the same as the pressure value of the new ball. Specification: Condition: 100% Brand New Item Type:Tennis Ball Case Material: fiber reinforced plastic Applicable scenarios: sports, other ball sports TENNIS ACCESSORIES: Tennis Repair Tool with Pressure Hold Function Application: Restoring tennis form Product Size: Approx. 8.5 x 20 x 7.3 cm / 3.3 x 7.9 x 2.9 inch Weight: Approx. 433g / 15.3oz Package List: 1 x Tennis Ball Box Cover 1 x tennis ball box 2x Gasket 1* Instruction Manual Note: 1. Please allow 0-2cm error due to manual measurement. Thank you for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.