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found this online

I hadn't thought about 4 types of wipers. So, your suggestion made me look into the OEM wipers on my car. But I couldn't find which of the 4 you show above. But I did lean that major replacement blades come in the various types shown. In the end, I just returned the clearly ineffective blade to Autozone. The salesman suggested the 'best' and most expensive wiper they have, the Bosch 24" Beam Wiper Blade, and it worked fine. Thanks for your help, Jim.