Voodans Tennis Training Device, Tennis Guide for Beginners, Advanced Players, and Tennis Enthusiasts (Black)

Height adjustable from 65cm to 96cm. (The base is plastic and can be expanded to 10kg by filling it with water or sand.) The tennis ball is a standard practice ball, and the tube is made of stainless steel. Easily practice your strokes at home or school, just like hitting a real ball. Easy to carry and very easy to assemble. (Registered: Trademark Application No. 71163)