The Mizuno RB500 ($N/A) has reached a new standard of lightness that’s destined to hurt the opposition. The Black Onyx carbon fiber RB500 has a larger-than-usual sweet spot that dominates the barrel (very nice), but it’s the redesigned coiled end cap that makes it special. It allows for a lighter weight without sacrificing control and balance, helping a batter swing harder and make better last minute wrist-snapping adjustments on the ball.