Condo Windows

A handy person from Texas says:
2230 stamped on side
There are a few options which seem the same

I need 10 of these.
Which ones do I choose.

Thanks,
Eric
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Bob from SWISCO responded:

See our S351-23 or S390-23. The only difference between these two balances is the depth of the bottom nylon shoe, so compare both with your old hardware to see what matches best. You will need a stamp option of 2230. 

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