Description STORM provides support for pitch black heavy duty urethane balls and creates a thunderwire The purpose of control on this ball is for lighter and short oil conditions. The core of the capacitor allows this ball to deliver straight and strong delivery. Coverstock: Controll Hard Urethane Weight Block: Condenser Core Factory Finish: 1000-grit Pad for 15 # Ball Color: Pitch Black RG: 2.57 Difference: 0.022 (15# Ball) Recommended Lane Condition Heavy Oil