Channel balance--want to order for two windows

A quick learner from Mountain View, CA says:
Details: channel balance 1/2 inch wide, metal part is 27 inches long, with a channel balance shoe depth of 1 inch. Top and bottom shown in attached photos. Number on the channel is 2630. I'd like to order these for two, double-hung windows, and would appreciate your guidance in telling me exactly what I should order. These are Viking vinyl windows. I have more windows that I'll be ordering channel balances for, but want to start with these two windows.
Thanks so much for your help.
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Jasmine from SWISCO responded:

Thanks for reaching out. Based on the attachments and the measurements you've confirmed, it looks like you'll need the S395-27 with a 2630 stamp.

You may use the website to place the order for these items. If you'll need assistance with placing your order, a member of our customer service team would be more than happy to assist. They can be reached at (888) 991-1929.

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