These are private label bowling balls overseas made by Columbia. These balls are nothing but cheap version of Icon 300 with different covers. The Sweep has Tec for its cover and Complete Sweep has Tec2. IF you see these bowling balls on e-bay and you want a cheaper version of a Icon 300 you should check into getting one of these balls. P.S. the rgs are the same as the Icon 300 2.528 diff 0.040