Emily from SWISCO responded:
July 29, 2021
Hi there! With this combination of fittings, you could have either an S380-27 or S385-27 channel balance. You’ll need to measure as shown below. The Series 380 has a 1" bottom fitting, and the Series 385 has a 1-3/32" fitting. You'll also need a spring strength option of 2640. If you have any further questions just let us know. Comparison of the S380 and S385 balance shoes.
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