Norco window crank - window opening to the right

A home owner from Lemont Illinois says:
I am looking to replace a Norco casement window crank for a window opening to the right
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Bob from SWISCO responded:

Thanks for posting. Start by looking at our 39-013 and 39-014. Let me know if the dimensions match up with your old hardware. 

A home owner from Lemont Illinois says:
Hi Bob

I am not sure how to measure this. The arm is 8 inches long and the track attached to the window that it glides in is 11 1/4 inches.

I would think the 13 1/2 would be too long.

Thoughts?
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Bob from SWISCO responded:

Hm, you'll need to disconnect the arm from the sash track to confirm the exact length, but I do agree it sounds like the 39-013 and 39-014 might be too long. Consider our 39-027E and 39-028E instead. These have 9-1/2" long arms. Even look at our 39-254E and 39-255E, which have 7-1/2" long arms. See if one of these sets is a better match. 

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