Does anyone know anything about [b]these horns[/b]?
Those look like some Nathan K5 knock offs that have been popping up over the last few years.
Scroll down and it same “Not OEM”.
If you’re serious about getting a K5 setup, check out the Classified section here: https://www.trainhornforums.com/forumdisplay.php?f=29
Can’t get a reply from the seller.
Give it some time … some of these folks check in once a week or so.