Most products assembled in maquiladoras are

Most products assembled in maquiladoras are sold in the United States.

Explanation:

The maquiladoras are industrial plants owned or controlled by foreign entities, where transformations or assemblies of components temporarily exported from more industrialized countries take place in a duty free and tax exempt regime. Assembled or processed products must subsequently be exported abroad.

There are several maquiladora regions in the world, being the best known and most important those located in the region of Mexico, that export their products to Canada and the United States.