Dynamo is the leader in commercial quality Air Hockey recreation products. Every product is precision made to the last detail. These pucks are made of high density plastic that is heavier than most pucks on the market. For this reason, make sure your table has a strong enough blower to lift the puck. Each order comes with 2 pucks. Please make sure you order the correct size puck set. The two sizes available are 2 1/2" and 3 1/4". The white pucks are slower and quieter, and the green pucks are faster and louder.