Window Coil Spring and Window Pivot

A home owner from Millersville says:
July 18, 2017
I would like to know the part number for the pictures attached.
User submitted image of their window hardware.
Profile picture of Paul
Paul from SWISCO responded:
July 21, 2017
Your coil balance shoe looks similar to our 15-177. This pivot shoe is made to work with our Series 160 (1/2" thick) or Series 165 (3/8" thick) coil springs. Please compare these to what you have and see what you think.
Coil Balance Shoe, Slate Blue
Coil Balance Shoe, Slate Blue
15-177
$3.47
3.5 lbs Series 160 Coil Balance
3.5 lbs Series 160 Coil Balance
S160-03
$4.50
3 lb Series 165 Egress Coil Balance
3 lb Series 165 Egress Coil Balance
S165-3
$4.70
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