Wisconsin was the only state that banned the sale of R134a Refrigerant to the general public. Even licensed technicians could not buy it in less than 15 pound containers. I recently found out that the rule has been suspended from July 12 to Dec 9 of this year. At that point it is scheduled to become illegal again. I just bought a couple of 12 ounce cans at Autozone. I guess laws don't have to make sense. If you are from Wisconsin, now's your chance to buy refrigerant for your car without a trip to Illinois.