Help finding the right Channel balance

A home owner from Kitchen says:
January 6, 2023
Hi-

I am trying to find the right Channel balance for my kitchen window. See arched photos for requested Information.

It is 18inchs long and has the marking that says 17 5 LO Caldwell.

Thank you for the help-
My number is 16507030584
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Tom from SWISCO responded:
January 9, 2023

Thanks for your photos. Based on what I see here, you have either our S351-18 or S390-18, depending on the depth of the bottom shoe. That's the only difference between them. I recommend measuring your shoe and referring to our dimensions to confirm the best match.

Comparison of the S351 and S390 balance shoes.
Comparison of the S351 and S390 balance shoes.
18" Series 351 Channel Balance
18" Series 351 Channel Balance
S351-18
$9.34
18" Series 390 Channel Balance
18" Series 390 Channel Balance
S390-18
$9.34
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