Andersen Stright Arm

A quick learner from st. Louis mo says:
I need three replacement arms and I'm pretty sure they are 39-095 and 39-094 make sure I have the right size and side. The back is marked 7191-2 which are called left, there is an L on the arm. So I think any 2 left and 1 right right.

You see picture 452 attached this is what is called a left.

There are three windows that open, as I look out I have left right center, the center opens with a left unit. Am I reading this right?
A customer submitted photo of a window operator.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
Thanks for posting! I agree with you; I believe that you may have the Andersen Straight arm Operator, 9-3/8". As for which side it could be,the best course of action is to simply compare each arm you have to whichever picture matches it on our site. You see, manufacturers name their operators "Left" and "Right" in an almost arbitrary fashion. Some manufacturers imply that the operator is located on the right or left side, while others imply that it opens the window to the right or left, respectively. There is no industry standard.

Like I said, your best bet is to simply compare your hardware to the pictures on our site and determine which arm is which that way.
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