Check the listing for details. Turbo Quad 2 Bowling Ball Finger Insert. Color: Black, Clear, White or Yellow, Condition: New. Listed at 6.84 USD. Turbo Quad 2 Finger Insert Upgrade your bowling performance with the Turbo Quad 2 Finger Insert, designed with patented features to revolutionize your grip. The glue channel on the outer surface ensures a cleaner installation, preventing glue seepage onto the bowling ball. Key Features: Power Nub (Side 1): Experience a sharp and powerful grip with rows of small, raised bumps. Ideal for bowlers seeking a strong grip. Semi-Tip Bump (Side 2): Enjoy a more relaxed grip with a smooth, rounded bump near the front edge. Perfect for those with arthritis or a weaker grip pressure. Size Indicators: Convenient size indicators on both the outside and inside for easy identification. Multiple Diameters: Choose between the 31/32" standard diameter (sizes 19/32" - 13/16") and the 1 1/32" large diameter (sizes 53/64" - 29/32"). Color Options: Available in 4 color choices to match your style. Durometer Hardness: 40 Shore A for optimal performance. Sold Individually: Customize your grip with individual inserts. Enhance your bowling experience and take control of your game with the Turbo Quad 2 Finger Insert. Choose the grip that suits your style and conquer the lanes with confidence!