Permeability is an important factor when considering which flex suppressor to select. Permeability is the parameter that shows how much electromagnetic waves a substance can absorb. It includes an inductance characteristic called µ’ (mu prime) and a magnetic loss characteristic called µ’’ (mu double prime). The magnetic loss characteristics of this µ’’ absorbs high frequency magnetic flux, which is the cause of noise and converts this electromagnetic energy into heat. It is effective in a wide range of MHz band to GHz band.