Feature:1. Standard tennis training, basically able to adapt to a variety of courts, adopting of natural rubber liner, pressure ratio for standard training tennis pressure, the ball feels comfortable.2. High elasic, durable for long time usage. Good bounce, suitable for using at home for tennis training.3. Come with the rope, single tennis training, easy to control landing, can be trained alone, suitable for women or beginners.4. Specially designed with the woolen material, to make the ball highly consistent elasticity, this tennis ball can meet the needs of a variety of occassions.5. Tie one end of the trainer to a fixture or tie it directly to the tennis racket, you can enjoy tennis without a tennis court.Specification:Condition: 100% Brand NewItem Type: Tennis Ball with Rope Material: Rubbe, WoolenColor: As Pictures Shown Model: 626 Promoting the amount of deformation: 0.20-0.25KN Rubber Band Unstretched Length: Approx. 4m/13.1ftDiameter: Approx.6.35-6.67cm/2.5-2.6in Weight: Approx. 305g.Package List:4x Tennis Ball with String