Set of three reel strips, $20. Specify 10 or 12 balls per game. These strips are printed on heavy photo paper. There is now longer a splice in each strip. If your game gives 10 balls per game it is very easy to convert it to 12 and it makes a much better game. It talks only about 10 minutes and requires only a small screw driver. If you're changing reel strips we recommend you change to 12 balls