window balance

Question

I need help identifying balances for a windows
The markings I see on the window:
2740

Jasmine · Accepted Answer

Thanks for posting! The balances for this window can be replaced with either the S380-28 or the S385-28. You'll need to confirm the depth of the shoe to determine which series you have.

Our 2740 stamp will support a sash weighing 19 to 26lbs.

Comparison of the S378, S380 and S385 balance shoes.