Hammer Black Pearl Urethane Weight:13 lb Retaining straps to secure bowling

Retaining straps to secure bowling balls

Transparent ball windows

Pure Slide microfiber Slide Soles on both sides

1 Switch Grip Insert compartment with foam insert

much like the Black Widow 2

Hammer Black Pearl Urethane Weight:13 lb Retaining straps to secure bowlingWE KNOCKED IT OUT OF THE PARK! Hammer has been the undisputed urethane champion in bowling since the Purple Pearl Urethanes introduction, and we are excited to carry that title through the new phase of harder urethane bowling balls. Since the PBA announced its rule change, only allowing urethane balls to be 78D or harder, our chemists and lab rats have been working hard producing the now famed NU Blue Hammer and the new 78 hardness Black Pearl