Replacement constant force coil balance

A quick learner from Buffalo, NY says:
I am looking for a set of replacements for the balances pictured above. The window sash weighs 13#.
Thanks
Thumbnail of the uploaded file named 20190510_081943.jpg
Profile picture of Bob
Bob from SWISCO responded:

See our 15-180 Pivot Shoe. This is compatible with our Series 190 Coil Springs. Does your window sash weigh 13 lbs? If so, then you could use a S190-740 7 lb spring on each side of the sash, for a total of 14 lbs of support (plus or minus 1 lb shouldn't make a difference). If you need new housing, see our 15-186 Balance Clip (for just one coil spring on each side of the sash) and 15-182 Balance Bushing. 

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 >
How to Replace a Triple Coil Balance System
How to Replace a Triple Coil Balance System
VIDEO
WATCH >
Removing a Triple Coil Window Balance
Removing a Triple Coil Window Balance
GUIDE
READ >
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.