Casement Operator

A quick learner from U.S.A. says:
a 12" surface mount wood Casement operator? I would need right and left
Thumbnail of the uploaded file named surface mount operator.jpeg
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Tom from SWISCO responded:

This operator looks similar to our 39-020, but our arm is 9", not 12". Can you confirm that dimension? From your photo, it looks like you're measuring the whole thing, not just the arm.

A quick learner from U.S.A. says:
Oh I didn't know, so measure the arm? Okay it's 9" sorry didn't know to measure just the arm.
Thank you very much

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