Now here is a real world practical application. Australia Post has a warning for shipping magnetic material in the post. Section D2.9.2 states... Any material that, when packed, has a magnetic flux density of 0.159 A/m or more at a distance of 2.1 meters from any point on the surface on the package (is deemed a dangerous good). They call it magnetic flux density but use A/m units, are they getting A/m confused with Tesla or am I confused? Under their definition, how would you measure 0.159 A/m because I don’t think a magnetometer will do the job.