Balance Code Missing

A home owner from Saint Louis, MO says:
Good morning,

I am looking to replace all my window channel balances.

I have varying window sizes and I am not finding a stamped code to help me with classifying each window size.

I looked all over this thing.

I think I have my top and bottom config correct based off your photos.

If I give you all my window sizes can you tell me which code to use for each window size? Any help would be greatly appreciated.

User submitted a photo of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
Hey, Joe. From your photo, it looks like you have a Series 390 balance, which comes with our 19-002 top and 15-001 (1-1/8" depth) shoe. Please compare and see what you think.
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