This is a polished Thunderbolt. The picture shows the ball sanded but this ball has been polished from the factory. It is virtually impossible to polish a ball like this by hand.
The Thunderbolt continues to be one of the most successful balls ever rolled on the Pro Tour. Ebonite's unique urethane formula "bites" into oily lanes for exceptional control. The dynamically-balanced Power Core increases gyroscopic action for a longer roll, sharper hook, less deflection, and dramatically more striking power. "Better" bowlers can improve their game on oily lanes. Roll the Thunderbolt.
