A retired British businessman is scheduled for extradition to the United States Friday on charges he plotted to ship weapons parts to Iran.

Authorities say 65-year-old Christopher Tappin is expected to appear before a judge in Texas later Friday.

Tappin has denied arranging the sale of batteries to Iran for surface-to-air missiles in 2006. He claims he was the target of a U.S. sting operation.

Tappin’s extradition, which he has fought for two years, was made possible by a controversial U.S.-British agreement, allowing an extradition before the case is heard in a British court.

Tappin loss his latest appeal earlier this month. If he is tried, Tappin faces up to 35 years in prison if convicted.