The Level 1 ball is large, lightweight and filled with air, making it a great aid to developing catching confidence. The Level 2 ball is malleable with a plastic seam, making it safe for developing catching skills with younger players and is availble in green or yellow. The Level 3 ball is a heavier ball, making it perfect for your higher ability players. Each is a set of 6. The Traffic Light Set is a set of 6, 2 each of level 1, 2 and 3 balls. The Coaches Set is a set of a set of 10 Vision Balls 2 x Level 1, 5 x Level 2 and 3 x Level 3. All sets come complete with a drawstring bag.