Need Window Part Identified

A quick learner says:
November 5, 2017
Hello I purchased 2 2130 sash and they are identical to the one that I had however this part does not fit with the sash my window will not go back in. Thank you
User submitted photos of window hardware.
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Paul from SWISCO responded:
November 8, 2017
The black vinyl part you show looks like a window stop. After you install the balances and sash in window frame, you would place this vinyl part at the top in the track to prevent the sash from hitting the top of the window.
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Tom from SWISCO responded:
November 8, 2017
I had another thought that this might be part of a top sash guide. Is there more to this part, or is this all there is? See the video below for more insight on what a top sash guide is. You can also see our complete selection here.
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