Quality Material: These Tennis Balls are made of rubber and tennis felt, featuring a soft inner core, and comfortable grip. They offer great elasticity and durability, allowing for long term repeated use. Features: The Training Tennis Balls have a diameter of approximately 6.4cm/2.52inch, making them resistant to hard hits and able to maintain their shape even after repeated use. Rebound Effect: It features a rebound function, adding an extra challenge to your training sessions and improving your reaction speed. The tennis ball ensures long term use even with frequent training sessions. Wide Application: These Training Balls are nice for various scenarios such as tennis sports, outdoor training exercises, tennis games, competitions, etc. They can also be used as interactive toy balls for playing with dogs. Great Gift: This set of Tennis Ball Toys makes a great gift for your family members or friends who love playing tennis, this multicolored tennis ball will enhance your skills and add fun to the game. Specification: Material: Rubber, Tennis Felt Size Chart: Diameter: 6.4cm/2.52inch Package Includes: 6 Tennis Balls Note: Please allow slightly errors 1-2cm differences due to manual measurement. Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!