Description: Tennis Ball Back Base Trainer is made of quality plastic, sturdy and durable, the bonus rubber rope is highly elastic and wearable with exquisite design and fine workmanship. It can provide stable support for training due to the base has a valve for putting sand or water into it to increase the weight, the concave part for placing tennis ball, convenient and practical to use. Great gift for your friends, family members and children who love playing tennis and it can help to improve your stroke action, footwork and hitting. Perfect tennis Ball trainer tools for precision control, skills of tennis, suitable for many places like garden, park, etc. Package: with elastic rope, 1 base trainer. Light weight design, easy to carry. Specification: Material: Plastic + Rubber Color: Blue Base Size: approx.15 x 20 x 5cm / 5.9 x 7.87 x 1.96 inch Ball Seat Size (Dia): approx. 6.3cm / 2.48 inch Rope Length: 3.8m / 12.46 ft Package Includes: 5Pcs Tennis Trainer Note: Product color may vary slightly from what appears online due to monitor differences.