Storm release 8 balls a year, non color change. 2 Premier, 2 Master, 2 Thunder, 2 Hot. Now with urethane moving up the ladder, we may see an extra ball here or there. But they average 1 ball every month and a half. Which is equal to the 45 day deal. Storm gets them out so the staffers can use them for the Summer Swing, the World Series and bowl expo.