Coil banalce

A handy person from North Haledon says:
Hello,

My windows might be around 40+ years old. White plastic with balance coil. Some of the snapped. The coil balance has 433 numbers engraved on it. Also plastics parts that coil is attached to. Please see pictures. I would like to buy 6 Pais to replace it. Also I do not know how many LB per balance coil is adequate. Should I go with 4lb or 6lb? Please help. Thank you.
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Casey from SWISCO responded:

Hello,

We'd be happy to help but, unfortunately, you photos did not come through. If you could send us photos of your pivot shoe and coils remove from the window, we'd be happy to recommend replacements for you. Thank you!

A handy person from North Haledon says:
Here are photos
Thumbnail of the uploaded file named 8A68B462-501E-454A-A1FC-C4706A81EB5D.jpeg
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Casey from SWISCO responded:

Thank you! The coil in your photo would be a match to our S150-4. The 433 stamp indicates that the coil supports 4 pounds and has 33" of travel. If you need other parts of the coil assembly, we'll need to see photos of them as well to compare to our inventory. Thank you!

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