Wiper Shaft, Left, Double Pin, '70 to '77 Std Bug, '71-'72 Super

This is the replacement wiper shaft, also known as the wiper pivot assembly.  It is the piece that your wiper arm connects to on the top side, and your wiper linkage connects to on the bottom side. Note that some are single pin and some are double pin, depending on how the linkage connects to it. See photo.