StrikeStackBall library
Hammer Black Widow Urethane bowling ball

Hammer

Black Widow Urethane

Released December 2017

Medium OilEarly HookTraction
Hook strength
7/10
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Specs

Coverstock
Urethane Urethane Solid
Core
Gas Mask Asymmetric
RG
2.500
Differential
0.058
Intermediate diff (mass bias)
0.016
Factory finish
360/500/500 Abralon
Released
December 2017

The oil, hook and strength labels are StrikeStack's estimate from the published specs, not the manufacturer's rating. Specs provided by bowwwl.com.

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