The Korea Customs Service (KCS), the national customs authority of South Korea, calculated that the total number of steel and aluminum derivative products subject to US tariffs has increased from 290 to 304.

The KCS stated that steel and aluminum derivatives are products that utilize steel or aluminum as raw materials, including auto parts, sports equipment, and furniture.

Before that, the US government started to impose a 25% tariff on steel and aluminum in March and levied a 10% baseline tariff on all products on April 5. Shortly thereafter, the US announced an increase in the steel and aluminum tariffs from 25% to 50% on May 30, effective June 4.