it says around the neck,
0.30kg,1.1l 2005 n2 ps 18.5 bar, ts - 30/+60 degrees c, gk

so would that mean that its tested at 18.5 bar, also on the back of the fire extinguisher, it says propellant 15bar nitrogen.

so would this mean that it would be ok to use as a 10bar buffer tank, (the stamp on the bottle neck is very faint, looks as if its been stamped before painted) and would pass a tech check.

billy