This is for one adapter that is 1/2" tall 6061 aluminum and fully machined. This will allow you to use a small Rochester 2G, Carter, or Stromberg WW two barrel intake manifold and bolt on a 2300 or 4412 and 0-4144-1 & 0-4365-1 Holley two barrel carburetor without modifying your intake. It can be used on a GM, Mopar, Pontiac, and other two barrel intakes or on a small base Pontiac Tri Power intake with a small center carb manifold with a bolt spacing of 1-7/8" x 3-1/4" on center. If you need a large adapter for the Pontiac outboard carbs we have that available as well in our store. The price is for one adapter but you can buy as many as you need.