1989 spring block & tackel # 2830 Silverline single hung non tilt window balance.

Thank you for your patience during this busy season. You have a discontinued Silverline window balance that is no longer made. The good news is that I believe you can use our S370-29 channel balance as a substitute. When prompted, you want to select the 2830 stamp option, as well.

Let me know if you had any questions.