Product Description Get pinpoint accuracy and show your style with this great looking Brunswick Tzone Galactic Sparkle bowling ball. Perfect for those looking for a ball to roll straight for spare shooting or for bowlers who shoot strikes with a straight ball. Available in many attractive colors and patterns at an affordable price.Color: Blue/Grey Sparkle*Please note that colors may slightly vary from image shownCoverstock: PolyesterWeight Block: Bullet CoreFactory Finish: High Gloss PolishFlare Potential: 1″ (Low)Radius of Gyration (RG): 2.696Differential (Diff): 0.019Intermediate Differential (Mass Bias): 0.000