Need replacement parts please help

What you have here is an old rod-type balance. These aren't made anymore, but the good news is that as long as the spring is 1/2" in diameter then you can use our Series 795 as a replacement. The only catch is that it takes a little handiwork to get it to install in your window.

Your next step should be to watch this video, which explains everything you need to do across the entire process. This should make everything clear.