the extra thin profile gives it the most stretch in either direction

You may know that coverstocks come in a variety of levels of aggressiveness

Color: PurpleAll colors do vary somewhat from the picture shown

Large:     12+

Roto Grip Gem Bowling Ball Weight:14 lbs. the extra thin profile givesRoto Grip Gem Bowling Ball Sometimes evolution can spark new life into technology from yesteryear. Such is the case with our latest introduction to the HP4 Line of balls. With recent more in depth studies of flare migration and core tendencies we circled the wagons back to the Defiant Series of bowling balls which featured a core ahead of its time regarding flare migration in order to create a longer constant motion. Upon further review and testing,