Elta North America, an Israeli-owned defense manufacturer with U.S. headquarters in Maryland, was one of four companies chosen to build a prototype for the border wall between the United States and Mexico.

The company is a subsidiary of Israel Aerospace Industries. Some 200 companies vied for the tenders, which will provide a $300,000 to $500,000 grant to develop a model. The tender was announced late last week.

In total, eight companies are building prototypes for the nearly 200,000-mile-long wall. Four will be concrete and four will have see-through or “smart” walls. Elta was chosen to work on the see-through walls project.

The final project could cost up to $25 billion.

Donald Trump made the border wall a theme of his presidential campaign. He has praised Israel for its southern border wall meant to stop African migrants from illegally entering the country.

Elta manufactures radar systems and components for branches of the American military. It also provides radar components for the Israeli military, which purchases them using U.S. military aid, which must be spent in the United States. At its Israeli headquarters, Elta manufactures radar systems for Arrow missiles, the Iron Dome anti-missile system, espionage and fighter jets, according to Ynet.