Balance Spring Attachment

A home owner from Virginia says:
November 18, 2016
Please see the attached pictures of the little plastic/teflon piece. At the top end, the piece has a hook and engages in the balance spring in the sash, and the lower end has a small hole/port where the spindle of the window is inserted to provide the balance for the raising/lowering of the window pane.

Any help in identifying the part will be greatly appreciated

Thanks,
Kamal
User submitted photos of window hardware.
Profile picture of Tom
Tom from SWISCO responded:
November 21, 2016
Hello Kamal. Please take a look at product 15-104. We believe this may be what you are searching for.
Caradco Friction Shoe
Caradco Friction Shoe
15-104
$1.95
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