1/2" Coil Balance ID

A quick learner from Delaware says:
July 7, 2020
MI vinyl windows
Thumbnail of the uploaded file named Coil.jpg
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Bob from SWISCO responded:
July 9, 2020

I believe you have a 15-180 Pivot Shoe, which uses Series 190 Coil Balances. Look these parts over to confirm. A stamp of '7' on the coil indicates you need the S190-740 7 lb spring.
A quick learner from Delaware says:
July 9, 2020
Thanks very much. I thought that might be the case, but I'm happier ordering with an exerienced guess.
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Bob from SWISCO responded:
July 9, 2020

That's what they pay me to offer! Let me know if you have any other questions. 
740 S190 Coil Balance Spring
740 S190 Coil Balance Spring
S190-740
$9.74
Coil Balance Shoe
Coil Balance Shoe
15-180
$3.97
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