SportX Tennis Balls 3-Piece Tube PRODUCT DESCRIPTION PRODUCT DESCRIPTION Durable and strong resistant tennis balls made of wear-resistant rubber and wool felt for permanent durability. These tennis balls have an excellent bounce height and maintain the same bounce for a long time. Very good for daily practice, training, or competition; enjoy playing tennis with friends however you like. Friendly for beginners and professional players. Let's train together. Can also be used as toy balls to interact with pets. Your sweet dog or cat will have fun. Our tennis balls come in a practical mesh carrier bag that is easy to store and transport. SAFETY WARNING Keep away from open flames or direct heat sources.