A quick learner from 00791 says:
Hello I do you have stopper preferably in beige as on the picture?
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Casey from SWISCO responded:

May we see the part from a bird's eye view so that we can take a close look of the details of the part?

A quick learner from 00791 says:
Sure see attached, I prepared order, would like to add this if you can identify.
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Paul from SWISCO responded:

We believe the piece you need is used to prevent the sash from going up too far in the upper window frame channel. We have a part similar to yours, our 15-147 that may work for you. Take a look. This part is only available in the color white. It is 5/8" tall and uses a #8 screw. We do offer the 33-020 screw that is 8 X 7/8" long.

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