Top sash guide identification

A home owner from USA says:
I would like to order channel balances and other window parts today but am having trouble finding this top sash guide on your website.

The dimensions are as follows:

The total length is 1
User submitted photos of a top sash guide.
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Paul from SWISCO responded:
Thanks for posting. I'm afraid your dimensions didn't post, but we will need them. Can you try again? Thanks!
A quick learner from Camarillo California says:
Hi,

The total length is 1 1/2 inches. The rectangular top is 3/4 inches X 9/16 inches. The top to the center of the hole is 1/4 inches.

Thanks,

Maribeth
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Paul from SWISCO responded:
Great, thanks! The closest I could find to your style and measurements is our 18-166. However, it's still a little different. Carefully go over the other measurements we show for this part and see how they line up to your top sash guide.
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