Storm has created the Pitch Black, a solid urethane ball, for their Thunder Line. This ball is intended to provide control on lighter and shorter oil conditions. The Capacitor core gives this ball a straighter but strong delivery.
Please note, I have 4 of these available, that is why I used a stock photo. All of them weigh 13lbs 12oz, but I am more than happy to send box specs if there is anything you are looking for in particular.