Casey from SWISCO responded:
March 19, 2024
Hello, I agree that your balance resembles the S350-28 (2740). The determining factor would be how the specifications from our product page compare to yours. The 2740 strength option will support a sash between 19-26 lbs. as shown in the chart under the balance product description. Thank you! Close up view of the S350 balance top.
Close up view of the S350 balance shoe.
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