This changing ball can be pitched after being junior high school student.
It is a great burden to grip the changing ball as the ball is larger from J to M and your hands are not growing yet.
This KS pitchball is a training ball that is sized for elementary school balls before you get to middle school.
Ball seams are higher than J, so they get more stuck on your fingers during practice.
Developed and produced in Japan by Kokusai a member of the Japanese Soft Baseball Equipment Commerce Association. Quality assurance
Made in Japan, it achieves a uniform rubber quality with minimal flesh and has a high level of feel and bounce.