Coil counter balance for window

A quick learner from Raleigh,NC says:
June 15, 2021
My window weight is 20lb, and I am looking for counter balance part shown in picture .
Can you please suggest some part number? There is no model or manufacture number shown on window frame.
Thumbnail of the uploaded file named s-qk7bMxTRyP_jHxZw_4Zg.jpg
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Tom from SWISCO responded:
June 18, 2021

Sure, we can definitely help. See our 15-180 pivot shoe, 15-181 cover, 15-182 bushing, and S190-540 coil spring. I recommend the S190-540 specifically because you said your sash weight is 20 pounds and because you have four springs per side. Using four 5 pound springs should be perfect for your window.
Coil Balance Shoe
Coil Balance Shoe
15-180
$3.97
Double Support Detent Clip
Double Support Detent Clip
15-181
$6.17
Balance Bushing
Balance Bushing
15-182
$1.80
540 S190 Coil Balance Spring
540 S190 Coil Balance Spring
S190-540
$9.74
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