Yes the vertical height. I saw a creators set up on youtube , he had 2 monitors in portrait that the bezel lined up perfectly. Looking closer now , it looks like he may of made them DIY with laptop panels. I appreciate you taking both the time to respond. I may make them myself or purchase 2 asus portable monitors. I have been looking for an excuse to get them for travel and I just thought of it as I was responding. I think they come in 15 and 17 inch models.
Cheers!