By combining the popular Vibe core with the hugely successful Violent Flip Reactive Solid coverstock that was used on the original Black Widow series this Hammer ball is sure to go viral, again. The Hammer Viral Solid develops a strong read at the mid-lane while conserving for a powerful move at the backend. This ball is best used on medium to light oil conditions. This bowling ball is Carbon Fiber Infused! Carbon fiber is one of the toughest materials on earth. Hammer decided to add this material to the inner core of this ball for added strength and durability allowing them to offer an incredible 3 year warranty.