Confirmation of window channel

A home owner from Daytona Beach says:
Hi I am the process of replacing some window hardware and it looks like you might be the right company to provide the replacement parts. It looks like I need a window channel replacement. I see you have multiple variants based on what I think is window weight. Would you be able to tell me which variant I need based on the attached pictures?
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Tom from SWISCO responded:

Thanks for contacting us! Looks like you have a Series 795 channel balance. Your stamp is a little uncommon for this style balance, so once you've selected your length you'll have to weigh your sash on a scale to determine the proper option. We have a chart on every Series 795 store page that tells you how much weight each stamp support.

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