Yep, as Sean said check your local refillers. Make sure they know it is for model airplane use cause otherwise they will want to charge you more to "certify" it....meaning its legal for use in businesses and such by the fire marshall. Our purpose is different and does not require that certification...just the hydro test on the container which is good for 5 years if I remember right.

Good luck with Halon as in most cases it is illegal except for full scale aircraft use.

Mark