What is this fitting + where can it be bought?

[bassetasse]

I have googled without success and now turn to you.
Does anyone know what this fitting is called and if/where you can buy such things?

 

[KnockOnWood]

It resembles something called assistentlyft,
https://www.beslagsbutiken.se/mixer-appliance-lift.html
Google assistentlyft to see more variants and suppliers.
https://www.google.com/search?client=firefox-b-d&q=assistentlyft