WASHINGTON (AP) — A Bangkok -based plastics firm has agreed to pay $20 million to settle with the U.S. over 467 “egregious” violations of Iran sanctions, the U.S. Treasury announced on Friday.

SCG Plastics Co. used U.S. banks to process $291 million in sales of Iranian high-density polyethylene resin from 2017 to 2018, according to the signed settlement agreement between the firm and Treasury’s Office of Foreign Assets Control.

The resin, used for product bottles and industrial items, was manufactured by an Iranian joint venture owned in part, by SCG Plastics’ parent company, SCG Chemicals and the National Petrochemical Company of Iran, which is a government entity.

The settlement states that SCG Plastics used “shipping and documentation practices that obfuscated the product’s Iranian origin and Iranian parties’ involvement,” which caused banks to unknowingly process transfers in violation of OFAC’s sanctions on Iran.