Part of the pulley system just below the coil
A quick learner from Charlotte, Nc says:
October 10, 2016
Please help identify the part or brand or where I can buy it
Tom from SWISCO responded:
October 13, 2016
This looks like part of the pulley system for a window balance. I'm afraid these can't be replaced by themselves. If yours is broken, you will need an entirely new balance. I am confident we can help, but we will need to see a picture of the entire balance system, whatever it has attached on either end, and the stamp printed on the metal channel itself.