Yes, this is possible without any problems. You can rotate the mount (with the monitor), so you can switch relatively quickly between horizontal and vertical alignment!
The maximum weight is 16kg (as indicated on the packaging). You can attach a monitor weighing a maximum of 8kg to each arm.
https://www.arctic.ac/ch_de/z2-basic.html
The Gigabyte M28U monitor is 28 inches in size, while the monitor mount is designed for a maximum of 25 inch monitors. The monitor is therefore not compatible as it exceeds the maximum monitor size of 25". In addition, the mount is designed for VESA 75x75 mm or 100x100 mm; the M28U generally supports VESA 100x100 mm, which fits, but the size restriction remains the deciding factor. The maximum payload of 16 kg is no problem for the M28U at around 6-7 kg.
The monitor mount is designed for two monitors up to a maximum of 25 inches. Monitors with 28 inches are not recommended, as the mount only supports monitors up to 25 inches and the maximum payload is 16 kg. The mount is also designed for VESA 75 x 75 mm and 100 x 100 mm.
Then with LG if they have the support vesa yes because as it is indicated it should read the support is accounting with screen 34" max. Double support therefore two 34" screens. Best regards
Unfortunately, the information on our site is incorrect, the product is actually suitable for a screen size of 25". We apologise for any inconvenience caused. You are welcome to contact our customer service if you would like to return the product and need support or help.
https://helpcenter.galaxus.ch/hc/de/requests/new
I must correct myself! It does have 4 USB ports...but still just 2 27 inch screens go next to each other...have now ordered another holder and will then weld the tube onto it, as there is no thread here (bought second-hand, but was unfortunately mistakenly a different version than this in the article).