The Hammer Black Widow bowling balls keep rolling out and dominating the lanes and this time in pink. The Hammer Black Widow Pink takes the Aggression Pearl CFI coverstock, and pairs it with their most angular core, the Gas Mask, to create a ball that goes long and then offers an aggressive backend reaction when facing medium to heavy oil. 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.