Top part on window

A home owner from Florida says:
I need part number. Are the the same on both sides
Thumbnail of the uploaded file named Top sash guide
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Paul from SWISCO responded:

Hello,

I suspect that you may have a Nu-Aire window, which uses the left and right handed 18-178 top sash guide pair. We'll include the dimensions from our product page below. Take a look and confirm that the specifications match up to yours. Thank you! 

Alternate view of 18-178
Alternate view of 18-178

Alternate image for 18-178
Alternate image for 18-178

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