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Hey there,

Thanks for writing in! Your operator reminds me of the 39-440B Encore Single Arm Awning Window Operator. To confirm that this is the right fit for your window, take a look over the dimensions and compare them to your existing hardware.

Dimensions for 39-440B

Alternate view and dimensions for 39-440B

This operator is compatible with either the 39-375 folding or 39-451 non-folding operator cover kits. The compatible track is the 39-512 SS 13-7/8" Awning Operator Track.