what options do I select

A quick learner from Florida says:
Hi. Based on my measurements, it looks like part# S380-29 is what I need. My question is what stamp options do i need to select? The picture I attached shows 28D USB printed on it.

Thanks
channel balance
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Tom from SWISCO responded:
Thank you for contacting us. A stamp of "28D" usually corresponds to our 2840 option.
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