Franklin's Indestruct-A-Balls are unlike any other plastic training ball as they are engineered to flex on impact to prevent cracking and reduce travel distance. The material is made for use with all bat types and automatically retains shape after contact. Franklin's Indestruct-A-Balls are available in 9in. Each model is lab tested and proven to be 5 times more durable than traditional plastic training balls. 9in. Training Balls Extremely durable and built to last thousands of hits Lab tested to last 5X longer than traditional plastic training balls Provides hitters instant feedback on contact Engineered to flex on impact to prevent cracking and reduce travel distance Limited-flight design for easier retrieval For use with all bat types Includes a reusable drawstring travel bag The material automatically retains shape after hit Franklin MLB Indestruct-A-Ball 9in. Training Balls - 8 pack.