Standard practice for specifying permanent magnets involves naming the magnet family and relevant magnetic properties such as Remanence, Intrinsic Coercivity and Energy Product. Sometimes the weight or density of a part is identified but not as a controlled parameter. Every permanent magnet supplier and distributor lists the relevant magnet parameters on their website with the non-magnetic parameters off to the side, or banished to another page. Normally these specifications are considered uncontrolled or reference values. Occasionally a designer references these parameters on a drawing, implying they should be controlled. This can lead to back & forth discussions about what can and cannot be provided. The MMPA, ASTM and IEC standards all leave decisions on these issues to the customer and supplier. This presentation will discuss the non-magnetic properties such as Tensile or Yield Strength, Hardness and others. The origin of some of the values will be discussed, the limitations on the measurements and why they shouldn’t be used as controlling parameters on drawings or specifications.