Coil spring balance

A home owner from Franklin square nyl says:
Need both coils for lower bath sash associated material says 4K on coil with pink/red mark on bottom of shoe. Sash 173/4 by 191/2
Thumbnail of the uploaded file named image.jpg
Profile picture of Tom
Tom from SWISCO responded:

Your old shoe looks like a match for our 15-177, which itself is compatible with our 1/2" thick Series 152 coil spring. Look these parts over and let me know if you agree.

How to remove window pivot shoes
How to remove window pivot shoes
VIDEO
WATCH >
Anatomy of a tilt window
Anatomy of a tilt window
VIDEO
WATCH >
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)
Current wait time is 3-4 business days
We promise that one of our experts will personally get back to you as soon as they are able. Thank you very much for your patience and understanding. If your inquiry is time-sensitive, please feel free to reach us at (888) 991-1929 or at help@swisco.com.