Window balance for single hung, marked BSI 2740 FG

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Home Owner from Keithville, Louisiana

Sep 28, 2026 7:56 pm

I need two of these because the pulley block broke on both left and right side. Do you have these?

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Jasmine from SWISCO

Sep 30, 2026 1:27 pm

Thanks for your post. This window balance is similar to the S380-28 and the S385-28. To determine which if these is the correct replacement, carefully look over the specifications and compare them.

I believe you'll still need the 2740 stamp option. A pair of these will support a sash weighing 19 to 26lbs.

Comparison of the S378, S380 and S385 balance shoes.