Emily from SWISCO responded:
June 29, 2022
Hello! It appears you have either our S380-28 or S385-28 channel balance. The Series 380 comes attached with a 1" deep shoe, while the Series 385 comes attached with a 1-3/32" shoe. Double check your bottom shoe depth and see which one matches up best. You will also need the 2740 strength option, based on your 27-4 stamp. Comparison of the S380 and S385 balance shoes.
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