President Donald Trump sent letters to 14 countries Monday outlining higher tariffs they’ll face if they don’t make trade deals with the U.S. by Aug. 1. In the letters, which were posted on Truth Social, Trump warned countries that they would face even higher tariffs if they retaliated by increasing their own import taxes.

President Trump has told 14 countries that they will face tariffs of at least 25 percent on Aug. 1 if they don’t reach agreements by then.

President Donald Trump has officially delayed imposing higher tariffs on US imports, while sending letters to 14 countries including Japan and South Korea detailing the levies they face. The latest development comes as a 90-day pause the White House placed on some of its most aggressive import taxes was set to expire this week.