Bob from SWISCO responded:
January 19, 2021
Does the top nylon fitting lack wings, like the bottom nylon shoe? Or does it have wings (i.e., side tabs) like our 19-005? If it lacks these tabs, see our S351-27 or S390-27. The only difference between these two balances is the depth of the bottom nylon shoe, or 'heel-to-toe' measurement, so compare both with your old hardware to see what matches best. The picture below illustrates the difference. In either case, choose a stamp option of 2640. Comparison of the S351 and S390 balance shoes.
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