FREE SHIPPING!!!! TaktZeit Tennis Trainer Rebound Baseboard Self Tennis Training Equipment Tennis Practice Rebounder with 1 String Tennis Ball Package includes: 2 tennis practice balls with elastic rope and 1 base trainer Material: Base made of quality PE plastic, tennis ball made of polyester, and ropes with high elasticity made of rubber Convenience: Lightweight and portable construction allows you to practice anywhere Perfect for solo training: No need to pick up the ball to improve your tennis ball hitting skills Instruction: Fill the base with water, rice sand or gravel to stablize the trainer, and just hit the ball