Replacement spiral balance springs

Question

Hi,

I'm replacing the springs in my condo. Just took a few out but they're so old that the color is faded. Measured it and it's 5/8 by 23 inches. I was thinking of going with red and I would rather not remove the window to weigh it. It's non tilt by the way. Let me know if red would be fine. See picture below

Emily · Accepted Answer

Hi there!

Thank you for your patience during our busy season. This looks like our 5/8" diameter Series 500 spiral balance. I know you said you'd rather not remove the window, but since your tip color is faded, weighing your sash on a scale is the only way to determine the appropriate color tip option.