Need help finding correct 29B bsi channel balances

A home owner from GA says:
April 20, 2020
Hi! I'm a home owner trying to fix a window with a couple broken channel balances. I'm not sure which part number to order and I would very much appreciate it if you can help me with this. I believe it says 29B (there may be a C after I'm not sure it's hard to see) then BSi. The window is vinyl single hung. Not sure if this info also helps but the Window's CAR# is 157-101, the Rating is H-R30 44x60. It also says it conforms to NFRC 100/200/300 WHE-K-001. Please let me know if you need additional info. Thanks so much!
Thumbnail of the uploaded file named C9FC5B3A-9A08-4252-A835-447DC02BC453.jpeg
Thumbnail of the uploaded file named 7BB75D95-A90A-43A5-8204-557C26AFADFA.jpeg
Thumbnail of the uploaded file named AC0A8CF1-71A7-4CD4-AB9D-93A8536A946A.jpeg
Thumbnail of the uploaded file named F8BA3AF9-6F8B-49FF-877D-90D2B9C4A887.jpeg
Thumbnail of the uploaded file named 26BE9B12-90A3-4274-9F72-06073C02084D.jpeg
Profile picture of Tom
Tom from SWISCO responded:
April 22, 2020

Hello! I think we can definitely help you with this balance. Based on the design of your bottom shoe in particular, I think our Series 775 would work well to repair your window. Look it over and let me know if you had any questions about this product.
A home owner from GA says:
April 22, 2020
Thank you. If they don't fit can they be returned? What's your return policy?
A home owner from GA says:
April 22, 2020
Tom looking at the other I see I need a 29" on the model you recommend and the shoe size is 1" what I don't know is which sash weight my window needs. How do I know if it's B, C or D? It's a single hung window.
Profile picture of Tom
Tom from SWISCO responded:
April 23, 2020

We do have a return policy, which you can see here.

Your old stamp reads 29B, looking at your pictures, so you want to select our 29B stamp.
A home owner from GA says:
April 23, 2020
Ok I forgot ? thanks
29" Series 775 Balance
29" Series 775 Balance
S775-29
$22.02
How to install a S775 balance
How to install a S775 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.