Which part to order

A home owner from Aurora, co says:
October 22, 2018
The info stamped on my channel balance says 26DS 36.The metal measures at 27 inches.
Can you help me determine which replacement I need?

Thank you!
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Tom from SWISCO responded:
October 31, 2018

Thanks for posting. The stamp you give us only tells us the strength of the springs. Which is to say, how much weight they can support. I'm not sure what Series you need though. This is determined by the nylon ends on each end of the balance. Could you show me a clear picture of each of yours?

Can you also confirm the weight of your sash? I suspect it's 36 pounds but I want to be 100% sure.
27" Series 385 Channel Balance
27" Series 385 Channel Balance
S385-27
$10.55
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