Spring opener, balancer

A home owner from Boynton Beach FL says:
Number stamp on the channel is 32DS 55L, can't find that on your site. Window type 122 single hung/fixed. Might be hurricane proof.
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Bob from SWISCO responded:

Thanks for writing in. I'm confident we can replace this balance for you, but it will have to be custom made: your stamp code indicates that this is a 'dual-spring' balance, meant for an especially heavy window. I just need a little more information from your end to get this started for you. Can you provide the length of the metal channel, not including any fittings at either end? Finally, can you provide us the exact weight of the window sash? This information will help us get this started for you. Many thanks.

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