Double hung window channel and this part

A home owner from New Bern NC says:
October 18, 2021
Not sure what this is called. The ends have broken off. Windows were installed by builder approx 2007
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Casey from SWISCO responded:
October 22, 2021

Hello,

Take a look and compare the 15-195B open cam T-lock shoe to your balance fitting. Thanks for posting! 
1-1/4" T-Lock Balance Shoe, Open Cam
1-1/4" T-Lock Balance Shoe, Open Cam
15-195B
$1.97
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