Are you able to recognize this?

A quick learner from Oakdale CA 95361 says:
October 6, 2021
Hello -

Not sure this is one of yours since the parts on your site look a bit different. But can you identify a pair in your inventory I can replace these with? The bathroom window is about 20 pounds.

Thanks!
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Casey from SWISCO responded:
October 12, 2021

Hello,

Your pivot shoe is actually an older version of our 15-180, which uses the Series 190 Coil Springs. You would need to use two of the S190-540 coils on each side of the window to support a 20-pound sash. Let us know if you have any questions and thanks for posting! 
Coil Balance Shoe
Coil Balance Shoe
15-180
$3.97
Double Support Detent Clip
Double Support Detent Clip
15-181
$6.17
540 S190 Coil Balance Spring
540 S190 Coil Balance Spring
S190-540
$9.74
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