Brunswick TZone™ Night Sky #RetroBalls Strictly not for use during

Strictly not for use during sanctioned competition

Lightweight and flexible woven mesh upper

Hammer is excited to release an innovative polyester ball

Dual adjustable straps guarantee a perfect fit on all roller bags

and the fact that some bowling centers just aren't as clean as others

Brunswick TZone™ Night Sky #RetroBalls Strictly not for use duringPOLYESTER: Great for first time ball purchasers or picking up spares. ACCURATE: Low hook potential, typically a spare ball or useful on extremely dry conditions. Balls with higher numbers will be the straightest. REACTION SHAPE STRENGTH: 99 The higher the number the stronger the reaction shape with 1 being the least and 100 the most.