To clear up confusion.
Part A is the wiper arm (white line) which is the part that attaches to wiper pivot to the wiper blade.
Part B is the wiper blade (the metal and the rubber parts combined – part where tape measure is measuring). The blade pivots on the wiper arm and normally there is a "quick disconnect" (blue circle) to the arm (which may or might not be "quick").
Part C is the rubber refill for the wiper blade (part B).
If you currently have nice and complete set wiper arms and blades, it is best to only replace the wiper refills when needed. Most part stores will want you to purchase the more expensive wiper blades – which might be OK for the newer cars or might be OK for winter blades (for those who drive during the winter time) – but even then, just replacing the wiper refills take almost as long (as blade replacement) and are so much cheaper.
The only down side is one will need to look at part stores web site to get the (correct) part numbers first.
9 times (out of 10) the parts counter person will want you to upgrade to wiper blades – don’t fall for it (unless you have lots of extra cash on you). The above part number came from O'reilly Auto parts website, and is part number 46-180 (Trico)
All FMJ vehicles use 18” long blades. A person can get wider blades to fit – but the 18’s have a hard-enough time working with the curvature of the windshield.
BudW