Available is a Track 919C 15LB new, and undrilled, but not box.Track 919C Bowling Ball Continuous Control. Exactly what is needed on the toughest of heavy oil lane conditions. Have no fear, the Track 919C bowling ball is here Truly the best high performance ball Track has ever made, the 919C features an all new core with a revolutionary HAZE coverstock. The name of the game: continuation! To make the most continuous mid-lane ball motion our R D team could produce. Yes, you heard me right...