Impact Practice Baseballs - 12 Pack Backpacks & Batpacks Or use 9" plastic balls

Or use 9" plastic balls for pop fly practice

8 millimeters

For a new shooting shape and grip control

With pro style patterns and a reinforced palm pad for impact reduction

Combination of flex and structure on back of hand for reinforced fit and durability

Impact Practice Baseballs - 12 Pack Backpacks & Batpacks Or use 9" plastic ballsConstructed with proprietary pop back material similar to the material used to make car bumpers, Impact Baseballs keep their shape and won't crack like standard practice balls even after thousands of swings. Built to provide instant feedback on contact, they help hitters tune their swings to find that all important sweet spot.