The Roto Grip Rock Star Bowling Ball 14 is a high-performance ten-pin bowling ball designed for medium-heavy lane conditions. Made of durable urethane material with a reactive resin coverstock, this multicolor ball features a symmetrical core type and a .050 differential. The ball weighs 14 lbs and comes with a manufacturer warranty of 1 year. It is approved by the United States Bowling Congress (USBC) and is ideal for serious bowling enthusiasts looking for a reliable and innovative bowling ball for their game. 14 lb drilled left handed Never plugged Excellent condition maybe 20 games IT thumb 3/8 Fwd