Black Channel Balance stopper

A quick learner from San Antonio says:
The black piece that attaches to the side of the window with one screw has cracked . . . . . it will not keep the channel balance down against the spring force. It is for the 28" Series 395 Channel Balances I have previously ordered from SWISCO in the past. Thank you in advance.
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Emily from SWISCO responded:

Hey there!

It sounds like you need a new top sash guide. In order for me to ID what you have, I'll need you to remove an undamaged top sash guide and show us pictures of it from a few different angles. 

Thank you!

A quick learner from San Antonio says:
Here you go
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Emily from SWISCO responded:

Great, thank you! It looks like you have our 18-174 top sash guide. Take a look and let me know if you have any questions. 

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