I have not been able to locate this part, for a silver line single hung window made around 2000. Any suggestions would be appreciated!
A quick learner from Maryland says:
November 8, 2017
This is a block and tackle balance, I think.
Paul from SWISCO responded:
November 13, 2017
Silverline replaced this old balance shoe with our 15-046 balance shoe. Yes, it does work with a block and tackle balance system, specifically the Series 765 balance.