Casement operator

A professional from Washington says:
There was a 40986 stamped on one of the arms. The window is a Milgard Classic from 1999.
Thumbnail of the uploaded file named Sudduth, IMG_7334.jpg
Thumbnail of the uploaded file named Sudduth, IMG_7335.jpg
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Bob from SWISCO responded:

See either our 39-253LB or 39-438B. The difference between these operators is shown in the video below. Let me know if you have further questions. 

How to Orient a Dual-Arm Operator
How to Orient a Dual-Arm Operator
VIDEO
WATCH >
Comparing the 39-253LB & 39-438B Operators
Comparing the 39-253LB & 39-438B Operators
VIDEO
WATCH >
Anatomy of a casement window
Anatomy of a casement window
VIDEO
WATCH >
How to identify casement and awning operators
How to identify casement and awning operators
GUIDE
READ >
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