Coil balance springs and shoes

A contractor from San Diego, CA says:
Hi, looking to replace the coil balances (they look similar to series 160), and pivot shoes ( look similar to 15-111). Can replace standard support too for good measure.
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Bob from SWISCO responded:

I agree, the shoe looks like our 15-111. This shoe tends to use our Series 160 1/2" thick springs, but it also sometimes uses our Series 165 3/8" thick springs as well, so compare the thickness of your old coil springs to confirm what matches up. Let me know if you have further questions. 

A contractor from San Diego, CA says:
Do you know what these markings on the spring mean?

5 35" P
#5232308

Thank you!
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Bob from SWISCO responded:

The 5 stamp likely means these are 5 lb springs, or rather, they support 5 lbs of support individually. Again, depending on the thickness of your springs, that would mean you need either the S160-5 or S165-5. If you're uncertain about the spring weights you need, give me the exact weight of the window sash, and I can work it out for you.

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