Emily from SWISCO responded:
August 12, 2022
Hey there! Your balance is a match for either our S351-29 or S390-29, depending of the depth of the bottom shoe. The Series 351 has a 1" deep shoe and the Series 390 has a 1-1/8" deep shoe. Measure as shown in the image below to determine the best replacement option. You will also need the 2830 spring strength option for a sash that weighs 16 to 23 pounds. Comparison of the S351 and S390 balance shoes.
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