... series soft ferrite magnetic core,Mn-Zn ferrite magnetic cores.widely used in industries, telecommunications, computer and peripheral equipment, switch power, CRT color ... TD44,TD47,TD90,TD95,TD50Initial permeability:25 degree,2000-3000Saturation magnetic flux density:25 degree,470-520Remanence:25 degree,50- ... temperature:>=190 degreeElectric resistivity:4-9 Ω*m Toroidal soft magnetic iron core bead