Length

A home owner from Minneapolis says:
No markings found. 30 inches long by 1/2 inch wide.
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Tom from SWISCO responded:

We can absolutely supply this balance, but it has to be a custom order due to its configuration. What you have here is a plain tilt window channel balance like our Series 770, but with the bottom clip replaced by our 15-170 and the top screw plug replaced with a cross-rivet.

Does that look good to you? If so, I need a bit more information. To start with, since there are no markings on your balance we will instead need to know the exact weight of the sash that it supports. This will allow us to calibrate the strength of the spring. That calibration is usually denoted by the stamp, but since yours has none this is our only other option.

Can you also tell me how many you wanted to buy?

Once I have this information, I will email you a purchase link and price quote that you can use to add these to your cart.

A home owner from Minneapolis says:
The sash weighs 34 pounds. I will need two of each item, 1 per side. Thank you.
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Tom from SWISCO responded:

Awesome, sounds good! With that sash weight you'll want the 30F stamp, which carries 33 through 37 pounds.

I'll email you that order link and price quote right now. Please let me know if you had any other questions.

How to replace a tilt-window channel balance.
How to replace a tilt-window channel balance.
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Classifying Channel Balance Fittings
Classifying Channel Balance Fittings
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