Give us a clue what is an Antos?
I changed one the other day from an Actros and fitted into a brand new Man both were 6mm
Tried to fit one into a DAF at the weekend and found due to the night heater being fitted behind the seat I couldn’t get access to the pipe.
After then removing the seat I then found the pipe feeding it is probably only about 4mm, at that point I bolted the seat back in and didn’t bother!
I thought you wouldn’t get much blow from a spindly little pipe