These shoes offer durability

reliable slide every time

Extra gripping power with bowling ball surface

Storm is synonymous with high performance

Brunswick Quantum Bias Pearl Bowling Ball Select Weight:16 lbs. These shoes offer durabilityBrunswick's successful relaunch of the Quantum product line continues with the Quantum Bias Pearl. This bowling ball features high density Quantum Mushroom High RG Asymmetric cores along with a thicker urethane coverstocks. This thicker coverstock offers durability, longevity, and massive hitting power. This ball is unique in that each core has a unique design to compensate for the gross weight of the ball, the core's dynamics, and the balls hook