The Department of Homeland Security has announced plans to begin soliciting pitches for a prototype design of President Trump’s proposed wall along the Mexican border. The notice, put out on the department’s website Friday, says contractors can submit proposals starting March 6. Submissions for the concept designs will then close on March 10, with applicants narrowed down by the 20th. The remaining vendors must then satisfy the full proposal request and offer an estimated price.

Homeland Security said it’s possible that multiple winners will be selected. It plans to announce the winning design(s) of the wall, which runs nearly 2,000 miles, in mid-April.

via Trump Administration Just Took Its First Step Toward Building the Mexican Border Wall — Fortune