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Wilbur Ross, U.S. Commerce Secretary announced that the United States is set to collect tariffs on $1.96 billion worth of aluminum sheet from 18 countries, according to Fox Business.

The move is subsequent to it being determined that the goods were being unfairly dumped in the country.

“This is the largest and most far-reaching case that our department has brought in more than 20 years,” Ross said Friday morning during an interview with FOX Business’ Maria Bartiromo.

“It’s a very complicated matter, but the matter of the fact is, there’s a lot of illegal dumping in the US, and that’s what we’re clamping down on,” he said.

The tariffs on 18 nations, which include Germany, Bahrain and Oman, will go into effect immediately.

Additionally, Brazil, Croatia, Egypt, Greece, India, Indonesia, Italy, Romania, Serbia, Slovenia, South Africa, South Korea, Spain, Taiwan and Turkey were also affected.

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The U.S. International Trade Commission is expected to make the final determination in February 2021, he said.

China is not on the list, Ross said, because the department already imposes tariffs on Beijing’s aluminum products. That levy has caused Chinese excess capacity into other markets that displaced production in those countries and resulted in dumping in the U.S.

The tariff rate will be highest against Germany with 52% to 132%, followed by Bahrain with rates in the single digits.

The Commerce Department began an investigation in March into whether the 18 countries were dumping aluminum sheet in the U.S. market, and whether four of them had unfairly subsidized their exports.