Gamma Revolution Foam Training Ball 12 Pack

Almost same as Penn QST36 but a little bit heavier and last longer. The price is comparatively higher. Instead of selling by dozen, better to sell in small packages. Recommend to juniors and beginners.

Love these for the kids, they keep their bounce and bounce to the perfect height.

We feel like these are the highest quality foam balls out there. They bounce the best and hold true to shape and bounce the longest. They will fade and show use, but not nearly as quickly as other foam balls. We use these outside on the driveway, in our garage, in the basement, and on the tennis court. These balls are great for developing spin and touch. They are also a great way to teach people new to tennis how to stroke correctly.

I am a high school tennis coach. I bought these to use when we are forced to practice inside. They are a great training aid for control and stroke production.