1980's Better-Bilt double hung tilting window. Need pivot bars. The tips of mine are broken off. What remains is about 1 3/8" long. I also took a picture of the pivot so you can see what the pivot bar goes into.
Bob from SWISCO responded:
May 5, 2020
See our 26-375 Better Bilt Pivot Bar. If you need the spring mechanism as well, see our 26-016 .