If you need a ball for oily lanes, the Vertigoâ„¢ is the one! STORMâ„¢ has incorporated a newly-formulated SFAâ„¢ coverstock, scuffed to an 800-grit matte finish, which maintains high-performance standards over time. On a heavily oiled pattern with moderate carry-down, the Vertigoâ„¢ revs up strong in the mid-lane and makes a dramatic turn at the break point. Don't take it from us, experience it for yourself. You'll be surprised with the backend reaction this ball produces despite the dull surface. Or polish the Vertigoâ„¢ up to 1500-grit to increase the backend "snap"! The pin action of the newly designed asymmetrical RAD3 weight block combined with the equally new SFAâ„¢ coverstock, will make your head spin!