Need the spring part for my window

A home owner from 52333 says:
May 10, 2021
Can someone please tell me where I can get this part? Mine doesn't have the metal enclosed around it. Only the spring itself.

Thank you.
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Bob from SWISCO responded:
May 12, 2021

Hello there. This old crossbow balance is no longer made, but it can be replaced with our Series 795 Channel Balance. The video below shows how to do this and what you'll need to account for.
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