Tennis Trainer Tennis Training Single Self-Learning Tool 5 Pieces The tennis ball back trainer is made of, sturdy and durable, the rubber rope is very flexible and wearable thanks to its exquisite design and excellent workmanship. It can provide stable support during training, because the base has a place to pour sand or water to increase the weight, concave part to place the tennis ball, convenient and practical to use. A great gift for friends, family members and children who love to play tennis and can help improve the action of hitting, leg work and hitting. Excellent tennis ball trainer tools for precise control, tennis playing skills, suitable for many places such as garden, park, etc. Package: with elastic rope, 1 basic trainer. Lightweight design, easy to carry. Specifications: Material: rubber Color: Blue Base size: about 15x20x5 cm/5.9x7.87x1.96 inch Ball socket size (diameter): approx. 6,3 cm / 2,48 inch Rope length: 3,8m/12,46ft The package includes: 5 pieces tennis coach