The Dutch company that received millions of taxpayer dollars to develop an affordable ventilator for pandemics but never delivered them has struck a much more lucrative deal with the federal government to make 43,000 ventilators at four times the price.

The US Department of Health and Human Services announced Wednesday that it plans to pay Royal Philips N.V. $646.7 million for the new ventilators—paying more than $15,000 each. The first 2,500 units are to arrive before the end of May, HHS said, and the rest by the end of December.

Philips refused to say which model of ventilator the government was buying. But in response to questions from ProPublica, HHS officials said the government is purchasing the Trilogy EV300, the more expensive version of the ventilator that was developed with federal funds.