Spring/ lock shoe

A quick learner from New York says:
April 6, 2021
I am not sure which type of double spring and lock shoe I need to order. Upon review, I see a CL engraved on the top spring and a B engraved on the bottom spring. There is a 0 on one of the plastic covers and a J on the other plastic cover. Can you please tell me what I need to order?

Thank you!

Tom
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Bob from SWISCO responded:
April 8, 2021

Hey Tom. This looks like a 15-177 Pivot Shoe, which uses our Series 152 Coil Balances. To know what spring weights to select, give me the exact weight of your window sash and I can work it out for you.
Coil Balance Shoe, Slate Blue
Coil Balance Shoe, Slate Blue
15-177
$3.47
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