Storm IQ Tour Bowling Ball (15lbs) The Master line features new technology with innovative core designs and coverstock combinations that yield a wide variety of ball reactions Often you need a stronger core and cover like that of the Modern Marvel, but sometimes lane conditions can get a bit tricky or a little squirrely When that happens, you need something to calm down the dreaded over-under reaction and get you back in the pocket! The Master line has long helped players across the globe achieve great levels of success Often you need a stronger core and cover like that of the Modern Marvel, but sometimes lane conditions can get a bit tricky or a little squirrely When that happens, you need something to calm down the dreaded over-under reaction and get you back in the pocket! The Master line has long helped players across the globe achieve great levels of success