Tom from SWISCO responded:
September 2, 2016
Thanks for contacting us! I think we custom make this, however 34-5/8" is a bit of an awkward length for this Series. We can make a Series 390 for you that is 34-1/2". Could you get that to work? If so, please tell us the stamp printed on the metal channel. That will help us get started. Please also tell me how many you need.
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Tom from SWISCO responded:
September 9, 2016
Thank you for your patience. That stamp is a little peculiar, and we've had a hard time finding anything that matches. Would you be able to weigh your sash instead? That way, we can at least calculate the proper spring strength. We can't seem to find a match for that stamp anywhere!
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Tom from SWISCO responded:
September 13, 2016
Ah, that explains a lot. Thank you! I will email you the order form immediately.
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