Replacement coil assembly

A home owner from Indianapolis says:
September 4, 2021
Both the left and right coil balances need replacing. The pictures are attached. I am needing to know which patient need. The window weighs about 8-10 lbs. There is a photo of the window model number. I can repair it without issue I just need the correct part. Thanks.
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Tom from SWISCO responded:
September 10, 2021

Your pivot shoe appears to match our 15-199, which is compatible with two different sized coil springs: the 1/2" thick Series 160 and the 3/8" thick Series 165. I will need you to remove the old springs and measure them to confirm which size is necessary. That will also determine what plastic cover will fit best.
Pivot Shoe, 17/32" Thick
Pivot Shoe, 17/32" Thick
15-199
$3.70
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