New in box vintage McCauley #16-0-20 Mighty Mac training wheel set for 16-20" children's bike.  Box never opened so not sure on the content's condition.  If you are seriously interested in purchasing and would like us to open the box to take photos, please message us.  Made by McCauley Metal Products, Buffalo, NY.  The right addition to your vintage Murray, Free Spirit or Huffy department store style kids bike.