Compare the specs of the Hammer Black Pearl Urethane and Hammer Effect side by side in the ball comparison table below. To view the full bowling ball review for one of these balls, click the ball name link in the table below.
Click here to add or remove balls from this comparison.
 |  | |
| Brand | Hammer | Hammer |
| Ball Name | Black Pearl Urethane | Effect |
| Cover Name | Urethane Pearl 78D | HK22 – Cohesion Pearl |
| Cover Type | Urethane Pearl | Reactive Pearl |
| Box Finish | 500 SiaAir | 500 / 1000 / 1500 SiaAir / Factory Compound |
| Color | Black Pearl | Maroon / Blue / Black / Purple |
| Core Name | LED | Huntsman |
| Core Type | Symmetrical | Asymmetrical |
| RG | 2.650 | 2.470 |
| Total Diff. | 0.015 | 0.050 |
| Int. Diff. | 0.000 | 0.017 |
Torque Length Back End Total Hook Ball Tester Ratings | Already a premium member? Click here to log in. | |