This 15lb Storm Proton Physics bowling ball is perfect for those looking for high performance on heavy lane conditions. The reactive resin coverstock and asymmetrical core type make for a powerful ball that is sure to impress. This ball is ideal for ten-pin bowling and features a matte finish. The brand is Storm and the item weight is 15lbs. It's important to note that this ball has been previously used, but it still has plenty of life left in it to help you improve your game. Don't miss out on the chance to add this high-performance ball to your collection.Ball is drilled left handed with a Vise IT interchangeable thumb outer sleeve