Professional Tennis TrainerTennis Trainer Set includes tennis trainer baseboard with long rope ball, great for tennis self training. Quality MaterialTennis Trainer Rebound Ball for Solo Training are made of premium plastic material, durable for a long using time. Easy to UseTennis Training Baseboard can be filled with water and sand, convenient using, great for both kids and adults tennis training. Wide ApplicationsTennis Trainer Rebound Ball Set is widely suitable for playgrounds, gardens, parks, tennis courts, etc. GiftTennis Ball Trainer Set is also a wonderful gift choice for families and friends on birthdays, holidays and festivals, etc.