window sashing balance replacement

A quick learner from mn says:
need a match
Thumbnail of the uploaded file named window3.jpg
Thumbnail of the uploaded file named window2.jpg
Thumbnail of the uploaded file named window.jpg
Thumbnail of the uploaded file named w6.jpg
Thumbnail of the uploaded file named w4.jpg
Profile picture of Bob
Bob from SWISCO responded:

This appears to be a 21" Series 751 balance, stamped 20HD. However, your balance might use the 15-197 Knife Shoe, rather than the kind of shoe that comes attached to this balance by default (our 15-014). Please remove and compare to confirm. If your balances do use the 15-197, we can provide this, but the balances have to be custom built due to this unique design. We can do this for you no problem; I just need to know how many balances you need. From there I can draft a quote for you. 

How to install a ribbed tilt channel balance with knife lock shoe
How to install a ribbed tilt channel balance with knife lock shoe
VIDEO
WATCH >
Classifying Channel Balance Fittings
Classifying Channel Balance Fittings
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.