Compare the specs of the Hammer Black Pearl Urethane and Hammer Envy Tour Pearl 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.
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| Brand | Hammer | Hammer |
| Ball Name | Black Pearl Urethane | Envy Tour Pearl |
| Cover Name | Urethane Pearl 78D | HK22 – Envy Pearl |
| Cover Type | Urethane Pearl | Reactive Pearl |
| Box Finish | 500 SiaAir | 500 / 1000 / 1500 SiaAir / Factory Compound |
| Color | Black Pearl | Chrome |
| Core Name | LED | Obsession Tour |
| Core Type | Symmetrical | Asymmetrical |
| RG | 2.650 | 2.469 |
| Total Diff. | 0.015 | 0.034 |
| Int. Diff. | 0.000 | 0.013 |
Torque Length Back End Total Hook Ball Tester Ratings | Already a premium member? Click here to log in. | |