New channel balance

A quick learner from Holmes Beach FL says:
January 21, 2021
New part from Swisco is on the right, old part on the left. The window won't close once the new channel balance is in. Please advise. Thanks
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Bob from SWISCO responded:
January 25, 2021

Sorry to hear the Series 380 Channel Balances didn't work for you. You can review our Return Policy here. I believe the issue is the bottom nylon shoe. The Series 380 comes with our 15-005 shoe attached. This shoe has a depth, or 'heel-to-toe' measurement, of 1". Your balances though might have shoes that are 7/8" deep, in which case you'd need balances with our 15-029 shoes attached. Please confirm your old shoe's depth to confirm, and we'll go from there.
Winged Channel Balance Shoe, 1" Depth
Winged Channel Balance Shoe, 1" Depth
15-005
$0.74
Winged Channel Balance Shoe, 7/8" Depth
Winged Channel Balance Shoe, 7/8" Depth
15-029
$0.82
How to Replace a Channel Balance Attachment
How to Replace a Channel Balance Attachment
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Classifying Channel Balance Fittings
Classifying Channel Balance Fittings
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