Get into the swing with this Solo Tennis Trainer Station With Ball  The tether cord is connected to a base that serves as an anchor Allows the ball to bounce back for another volley. Made of high-quality materials - strong, durable and designed to take powerful shots. Super-easy to use, simply fill the base with water to give it weight to counter the ball’s motion Its lightweight construction, when empty, allows you to bring it with you anywhere Improve your technique with this Solo Tennis Trainer Station With Ball - save 63%