• High quality rubber is used as the liner to ensure the elasticity, stability and durability of the ball.The outer layer is made of high quality chemical fiber, which greatly improves the wear-resistance of the ball surface.Tennis is standard in size and diameter, specially used for training and competition, and basically suitable for all kinds of fields.Good elasticity---- ball falls from 2.54 m high, and the bounce range is between 130 to 140 cm.Suitable for tennis competition, tennis training, or using it to train your pet.Pressurized Tennis Ball Polyester Orange Training Balls ITF Approved Quality Rebound ball Professional Rubber Tennis Ball High Resilience Durable Tennis Practice Ball for School Club Competition Training Exercises Tennis Ball Rubber Tennis Ball High Resilience Durable Tennis Practice Balls for School Club Competition Training New Tennis Balls Professional Reinforced Rubber Shock Absorber High Elasticity Durable Training Ball for Club SchoolFeatures:High quality rubber is used as the liner to ensure the elasticity, stability and durability of the ball.The outer layer is made of high quality chemical fiber, which greatly improves the wear-resistance of the ball surface.