TaktZeit Tennis Trainer Self Training Rebound Baseboard Tennis Training Gear with 2 String Balls (Flash Green 1.0)

["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"]