1.ferrite core|ferrite magnet|transformer core 2.range:EFD,EF,EE,EPC,ER,PQ,RM,UU, ... EC,DR 3.Supply grind gap and matched bobbin ferrite core| soft ferrite core ... | transformer core| ferrite magnet coreCore material: MnZn power ferrite material and MnZn high permeability ferrite materialcore range:EE,EF ...