Bob from SWISCO responded:
July 14, 2021
See our S351-26 or S390-26 Channel Balances. The only difference between these two channel 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. For a new stamp option you will choose 2540. Comparison of the S351 and S390 balance shoes.
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