Truth Dual arm operator

A quick learner from Anaheim Ca says:
Looking for dimensions of 39-439.
My operator stamped truth 31876, and 41012
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Bob from SWISCO responded:

Thanks for your patience during this busy holiday season. All dimensions for our hardware are listed in the pictures on the product pages. However, I'm fairly confident you actually have our 39-253L and 39-253R. This set of operators is identical in dimensions; the difference lies in the end of the link arms. You will note that the black rectangular piece, the track slider, on the 39-438 and 39-439 is more rectangular than the one on your old operators. The 39-253L and 39-253R do not come with the built-in track slider. Instead you can adapt our 39-529 to it. This is more square shaped like your old hardware. I believe this setup is a closer match to your old hardware. Let me know what you think. You can also see our Return Policy for any unused hardware here.

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