The longer shaft is 4 1/3” and the shorter one is 3”...it was found in the woods. ..the diameter of the larger fitting is 4 centimeters shy of an inch. This is a pic of what the other open end looks like at the end of the longer shaft.
View attachment 1826614
I’m guessing this part that looks like an uppercase (I) sat in an empty uppercase (I) as some sort of a stabilizer perhaps..being that it’s solid and most likely without any other function.