4¼ ring to outter 4 3/16 from the middle to the outter. Turbo thumb insert. The Storm Monsoon 15lb 2oz Reactive Resin Sanded Medium Plum/Emerald Ball is a premium bowling ball designed for medium lane conditions. Made of high-quality reactive resin, this symmetrical ball features a .042 differential and a RG of 2.53. With a striking plum and emerald color combination and a sanded finish, this ball is perfect for ten-pin bowling enthusiasts looking for precision and performance on the lanes. Whether you're a competitive bowler or just enjoy a casual game, the Storm Monsoon ball is sure to enhance your experience with its exceptional quality and design.
