Model: Foam/Sponge Practice BallsColor: Rainbow as picture showsDiameter: 4cmQty: 36 balls/ setFunction: Practice anywhere without worrying about breaking something with these foam balls.Features:Simulates the flight of a real golf ballCreated for indoor practicePerfect for approach shots or full shotsSafe contact with glass, furniture, and even people!Lightweight makes it hard to hit the ball very far, max distance is 10-12mCan float on the water, play in the poolSwing Problems Can be Magnified Practice balls travel less distance than normal b