Add complexity to your baseball or softball hitting practice with soft rubber, sand-filled weighted balls for baseball and softball. Tanner Weighted Training Baseball Pack includes: (2) 15 ounce, (2) 12 ounce, (1) 9 ounce, (1) 5 oz (Also available in single weight sets). Weighted baseball training forces the hitter to focus on delivering a powerful, accurate, on-plane swing in order to "get it right." A weighted ball set lets you vary the weight for overload and underload training. Use Tanner weighted balls for front toss, flips, batting tee training, and arm care routines. The Tanner heavy balls for batting practice and weighted baseballs for throwing can hel athletes build strength and power as well as for warm up and post training. The multi weight set also simplifies training with weighted balls for kids as they progress in weight / ability. Baseball weighted training balls can be used by softball players for overload and underload training. These baseball weighted training balls are a must-have for any serious athlete. The Tanner Baseball Plyo Balls for Pitching are sand-filled for added weight, making them ideal as heavy balls for batting practice or for pitching. Plyo ball training is also an excellent tool for coaches who want to train their players to improve their accuracy and power. These weighted balls for softball and baseball are durable enough to withstand the toughest of training sessions. But don't just take our word for it. Try the Tanner Weighted Baseball Training Balls for yourself and feel the difference. These are not just simple weighted balls, they are precision weighted balls designed to help you perfect your pitching and batting.