Unknown Sash Guide

A quick learner from Forney Texas says:
I do not see any markings on these slide up windows. I have identified the channels needed as 28" 2730
I need12 sash guides
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Tom from SWISCO responded:

Hello! This top sash guide looks like a good match for our 18-174. The design and dimensions seem to match up, but you can review them below to confirm.

Unfortunately, these are only made in black these days. White is no longer an option we can provide. I am sorry for the inconvenience.

Detail of 18-174
Detail of 18-174

Side view of 18-174
Side view of 18-174

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