The 15 LB Brunswick Ultimate Inferno Bowling Ball is a vintage bowling ball made of reactive urethane with a symmetrical core type. This multicolor ball features a polished finish and is designed for ten-pin bowling. With a mid-performance level and a lane condition suitable for medium surfaces, this ball is a great choice for bowling enthusiasts looking for a reliable piece of equipment. Ball is used and single drilled. There is a slight crack of of the fingertip