The Hammer Ocean Vibe 15 Pound Used Bowling Ball is a high-quality ten-pin bowling ball designed for medium-dry lane conditions. This blue ball features a pearl reactive coverstock and a symmetrical core type, providing mid performance on the bowling lanes. Made by the brand Hammer, this United States Bowling Congress (USBC) approved ball has a polished finish and is drilled for optimal performance. With a differential of 0.042 and a RG of 2.510, this bowling ball is a reliable choice for serious bowlers looking for a top-notch product.