37 inch channel balance

A quick learner from New York says:
November 17, 2019
Hi, Was wondering if you could identify this piece. The only marking I can find says "36-4", image included.

Thanks!
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Paul from SWISCO responded:
November 20, 2019

Hello and thanks for reaching out to us. Please have a closer look at our S390-37 channel balance. It's very important to compare the depth measurement of your bottom shoe and see if it matches up with ours. Look at the diagram below for more details showing the bottom shoe of the Series 390. If this is correct, you can select the 3640 option.
37" Series 390 Channel Balance
37" Series 390 Channel Balance
S390-37
$13.34
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