Contains 3 balls: Lightning Ball - Lighter than a traditional puck for developing quicker reaction times. 3 oz. / 44mm Skill Ball - Mimics hockey puck weight for normal simulation. 6 oz. / 55mm Power Ball - Heavier than normal pucks and useful for developing wrist and forearm strength. 10 oz. / 41mm A&R Assorted Stick Handling Balls MS1384255 MS1384255 610814232780