Hammer Black Pearl Urethane Weight:13 lb 1 Switch Grip Insert compartment

1 Switch Grip Insert compartment with foam insert

Embroidered logos

much like the Black Widow 2

Lasts longer than traditional polishes

Combination 1680D/600D nylon (Switch Grip Case is 600D nylon construction)

Hammer Black Pearl Urethane Weight:13 lb 1 Switch Grip Insert compartmentWE 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