... soft ferrite core low cost high permeability,low loss REACH,ROHS approved high grade soft ferrite magnetic core, Mn-Zn ferrite magnetic ... ,EI series,T series / toroidal ferrite,EP series,EC series,UU series,RM series,PQ series,EF series,UF ... LP series,and so on.Specs:material:Mn-Zn ferrite -DK3,TD3,TD4,TD44,TD47,TD90,TD95,TD50Initial permeability ... 4-9 Ω*m nice price soft magnetic steward ferrite core