The revolutionary Nitro Purple Haze delivers explosive performance on moderate to light oil lane conditions -- skidding longer, hooking later and harder -- providing the same power the Ebonite Nitro does on long heavy oil conditions. These two-piece balls have a specially-formulated urethane and a precisely placed Dynamic Core. The Nitro shell contains more than 11.5 pounds of high performance urethane in 14, 15, and 16lbs. Plus, the unique additive AJL51 delivers more surface contact with the lane than any other ball on the market. And the advanced compound HD106 creates a more powerful, harder-hitting shell that absorbs impact better than the competition. The result is a combination of the most advanced balls to be released on today's lanes, whatever the conditions.