I worked in a gas station in 73. If I remember correctly, all american cars and some foreign cars used the Trico or Anco refills which we're fitted to size, 15, 16, 19, and so forth. The refills we're not fitted to manufacturer. I'll bet Trico and Anco supplied blades to to Ford, GM and Chrysler. I could be wrong though, it's been a long time.