Hammer NU Blue Hammer
Not Urethane
Factory finish
500/1000 Siaair
Bad Ass Blue Pearl
Core (15 lb)
R.G. / Differential / Bias
16 lb2.5410.0350.000
15 lb2.5860.0270.000
14 lb2.6050.0260.000
13 lb2.5980.0250.000
12 lb2.5920.0310.000
Release date
November 16, 2023
Balls with the same cover
This is the only ball in the Bowlidex with the Not Urethane cover.
Balls with the same core
These balls have the same 15-lb LED core as the NU Blue Hammer:
Hammer Purple Solid ReactivePurple Solid Reactive
Nov 18, 2022
From the manufacturer

Hammer is excited to introduce a revolutionary ball – actually a game-changer for bowlers seeking alternatives to traditional urethane ball reaction. With recent changes to PBA rules regarding traditional urethane, Hammer took on the challenge of producing a ball that would mimic the performance attributes of the famous Purple Pearl Urethane Hammer without using urethane… and we nailed it. The NU Blue Hammer is “not urethane” but delivers a urethane ball motion. It is versatile, smooth, consistent, and predictable, making it ideal for challenging lane conditions. Bowlers will experience all the advantages of a reactive ball that can be used in any competition while benefiting from the classic Purple Pearl Urethane ball motion that has dominated the lanes for years.

Official site
Read more at hammerbowling.com