Tom from SWISCO responded:
July 26, 2017
Thank you so much for choosing SWISCO.com. It looks like you have either the Series 390 or Series 351 channel balances. The difference lies in the shoes. The Series 390 has the 15-001 shoe, which is 1 1/8" deep and the Series 351 has the 15-002 shoe, which is 1" deep.
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