Tom from SWISCO responded:
September 25, 2017
Thanks for contacting us! This balance appears to match our S390-38, but with a special strength spring for your heavy sash. We can make this for you but it will need to be a custom order. Before we begin, can you tell me how many you need? Did you just need one, or did you want to replace both balances on the same sash?
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Tom from SWISCO responded:
September 27, 2017
Great, thanks. I'll email you a custom order link and price quote for 4 right now.
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