Help with replacement balances

A home owner from USA says:
I am trying to find the correct window channel balance for my windows. Here are some pictures of each end and of what is stamped on the existing channels. Please let me know what you think. The METAL part is 29" long. I think it is the S380-29, but am not sure and don't want to buy 12 and they be the wrong ones.
User submitted image of their window hardware.
Profile picture of Paul
Paul from SWISCO responded:
Thanks for posting. I believe we can help. I agree, the S380-29 looks close. This comes with our 19-005 top and 15-005 bottom. Now, your nylon caps vary slightly in terms of design, but as long as the dimensions are the same you should be okay. See what you think.
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