coil spring balance replacement

A quick learner from New Providence, NJ says:
Please see 5 attached pictures. I would like to replace the these parts. The pivot shoe seems to be product code 15-015. The pivot bar on the bottom of the window matches with product code 26-040. The spring has the numbers 433 etched on it. Does that number give you the info needed for the correct spring, or should I measure and weigh the sash?
I would like the price for 2 of each - for both sides of the window.
Thank you.

User submitted photos of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
Hello, Scott. The parts you're showing resemble our 15-046 pivot lock shoe, 15-145 coil barrel, and 15-147 bushing cap. As for the coil spring, see our S150-4. One of these on each side can carry an 8 pound sash. Finally, your pivot bar looks like our 26-040. Let me know what you think!
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