Check the listing for details. 5 PACK JoPo Grips Bowling Finger Insert Power Flat/Oval Black. Condition: New. Listed at 14.95 USD. JoPo Grips Bowling Finger Insert Power Flat/Oval Black Check out the latest innovation from JoPo: the Power Flat/Oval Insert, designed to elevate your bowling game to new heights. Building upon the success of the JoPo Interchangeable Thumb System, this finger grip insert is a game-changer for fingertip and two-handed bowlers alike. With the Power Flat/Oval Insert, you have the freedom to choose between two distinct inner surface options. Opt for the flat cut for a classic feel and effortless release, or select the ergonomic oval for enhanced control and precision with every roll. For each Quantity of "1" you select you are purchasing 5 grips. This is 5 per size. NO MIXING SIZES OR COLORS The photo in the listing shows the style for saleOutside Diameter of these grips is 31/32