window casement operator

A home owner from MASSACHUSETTS says:
Looking to see if you guys have this part, it goes on the left window. I am going crazy looking for this part, nobody seems to have it.
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Bob from SWISCO responded:

This is definitely a little trickier than you'd think. At first glance it resembles our 39-318, but I suspect the arm on this is too short. Compare to confirm. The other possibility is our 39-171; however this has a link arm with an offset. To be honest, it might still work anyway, though in some cases you may need to reposition the stud bracket to make up the difference (if possible). Take a look and let us know your thoughts.

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