The product is a lot of 11 commercial design textbooks published in 1949 by Roy Haldorson under the title “Commercial Design Division 1-7, 9, 11, 12”. These books fall under the subject area of design and are focused on commercial design. The textbooks are aimed at providing instruction on design principles and techniques for students and professionals in the field. Made in the United States, these textbooks offer valuable insights and guidance on commercial design practices from the mid-20th century.