Product Description The Columbia 300 White Dot is the most popular polyester ball in history because of its consistent durability and color. Whether youre a youth bowler or a beginner, or an experienced bowler who needs to pick up some spares, Columbia 300 has a White Dot that will fit your personality and improve your game.Color: Mint/Silver/Black*Please note that colors may slightly vary from image shownCoverstock: PolyesterWeight Block: BulletFactory Finish: PolishedFlare Potential: 1″ (Low)Radius of Gyration (RG): HighDifferential (Diff): LowIntermediate Differential (Mass Bias): 0.000