Increase the hitter's mental concentration by hitting a small ball. Help the hitter improve depth perception by keeping head still and eyes level. 5-in./ 0.5 oz., Polyurethane-Foam ball. Sold by the dozen and the bucket (4 dozen) in White or Vision-Enhanced Yellow. If you want to work on a hitter’s hand-eye coordination the JUGS Small-Ball is the right ball for you. At 5-in. and 0.5-oz. the small ball will teach the hitter to focus on the ball, track the ball from release point to impact zone, and allows the fundamentals to be taught while removing the fear factor. These balls were specifically designed for the JUGS Small Ball Pitching Machine.