Teach the hitter to track the ball from release point to impact zone. Hitting a Jugs small ball will increase the hitter’s mental concentration and help improve depth perception by keeping head still and eyes level. Develop hand-eye coordination and a quick bat. Teach the fundamentals of hitting while removing the fear factor. Designed specifically for JUGS Small-Ball Pitching Machine. Polyurethane-foam Small-Balls (5″ / 0.5oz).