Features: 1High Stability: There is a valve on the base to put sand or water to increase weight The side is also provided with a small ring for hanging the belt, and the concave part is used for placing tennis balls It can provide stable support for training. 2Product Function: The product is easy to use, without picking up the ball Moreover, it is light and easy to carry, which is very suitable for single person practice It can also improve your attention, movement ability, coordination ability of hands and eyes, and develop your interest in sports. 3Practical Design: It adopts anti skid hole modeling design, which can be filled with heavy objects for training Its semicircular ball structure makes the ball easy to attach The wall mounted traction rope design is helpful for cleaning. 4Convenient to Carry: The product is small in size and light in weight Users can take them to any indoor or outdoor open place to practice tennis skills. 5Applicable Situation: Users can use elastic rope to tie the ball to the base to practice tennis skills It is not limited by the venue and is suitable for tennis courts, basketball courts, gardens, parks, garages, basements, fitness rooms or other open places. Item Type: Tennis trainer Main Material: Plastic Base Size: Approx. 21x20.5x4cm / 8.3x8.1x1.6in Weight: 195.00g/6.87oz Package Included: 1 x Tennis Ball 1 x Base 1 x Hook