Vakuum hose through wall mount

The vakuum cleaner for my CNC machine is placed in he next room in my basement, to keem the noise away from me. For this, I needed a hole in the wall to take the vakuum throgh. For a nicer look, I designed this wall mount that I share with you now.
The mount is for a 40mm diameter vakuum hose. I sealed the connection to the hose and he wall with silicone.