Which Series 170 to I use for my Certainteed balance?

A home owner from Camden SC says:
I need to replace pivot shoe and coil balance on CertainTeed window I know the pivot shoe is product code 15-155 and series 170 coil but don't know which coil to use ?
Profile picture of Tom
Tom from SWISCO responded:

It would depend on what number is printed on your old springs. I would look them over to see what you can find. If there are no stamps, you'll have to do a little math. Weigh your sash on a scale and give me the exact weight and we will match it up to the best option.

Reply to Thread
Use this form to ask a follow-up question or to share your experience regarding this subject.
(your email address will be kept private and is only used to inform you when a response has been made)