Milguard window hardware replacement

Question

I will need several of these but want to make sure it's the right part. I have 5 windows, 3 which open right to left and 2 which open left to right.

Tom · Accepted Answer

Your operator appears to be a match for either our 39-253LB or 39-438B. The only difference between these two styles is the design of the guide at the end of the arm, which is not visible in your photo. Look them over to determine the better match.

The video below will also offer a more detailed explanation of what I'm talking about.