Molten BG2010 Indoor Outdoor Basketball - Deep Channel - Premium Rubber The BG2010 has deeper channels that enable better control of the fingertips when aligning the throw. With 12 fields on the ball you have additional seams, which means that you are easier to find if you set up for a quick three -point throw! An outstanding rubber basketball. Thanks to the properties of very durable natural resin rubber, this ball offers a better grip than typical rubber basket balls. The silica -like surface structure ensures that the grip is preserved even when contacted with water or sweat. With nylon butyl bladder for additional strength and shape resistance during the game. There are 4 different ball sizes in basketball. Here is a brief overview of what these mean. is the official size for women's b.