Casey from SWISCO responded:
April 4, 2024
Hello, Your channel balances resemble the S380-27 as long as the bottom fitting has the same 1" depth shown below. Note that the 26B would generally correspond to 2620 strength options for your replacement balances, which will support a sash between 9-13 lbs. Close up view of the S380 balance top.
Close up view of the S380 balance shoe.
We also offer the 18-180 top sash guide. Take a look and see how the dimensions below compare to yours. Thank you! Detail of 18-180
Side view of 18-180
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