SWISCO - The Replacement Hardware Authority

my Stamp code

A home owner says:
The stamp code on my channel balance says "27 C" so I'm not sure which weight my supports.
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Tom from SWISCO responded:
I see you're looking at our S380-28. Is that the balance you have? If so, a stamp of 27C usually corresponds to a 2730 option. However, you should weigh your window sash to confirm that this is correct. The S380-28 page has a full list of available options and how much weight each can support.
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