Numbers 2030. Length 21 inches

A quick learner from Wichita kansas says:
Need these replacement parts but do not know the manufacture
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Bob from SWISCO responded:

See our S351-21 or S390-21. The only difference between these two balances is the depth of the bottom nylon shoe, or the 'heel-to-toe' measurement, so compare both with your old hardware to see what matches best. See the image below for reference. For the stamp option choose 2030. 

Comparison of the S351 and S390 balance shoes.
Comparison of the S351 and S390 balance shoes.
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