unknown channel balance

Home Owner from Santee, CA
Marking: 18 3 BSI

Metal to Metal: 18-3/4"

channel width: 1/2"

Bottom shoe doesn't match to any of your products. Dimension 1-3/8" x 1-1/8" x 1/2"

Please help recommend the equivalent balance to order.
User submitted photos of a window balance.
2 Replies
Tom
Tom from SWISCO
SWISCO
Expert
Thanks for posting! This is a special kind of balance that will need to be custom made. Thanks to your pictures and information, we have everything we need to get started. I will email you a custom balance order link for 2 of these right now.
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