1.ferrite core|ferrite magnet|transformer core 2.range:EFD,EF,EE,EPC,ER,PQ,RM,UU, ... grind gap and matched bobbin ferrite core| soft ferrite core| transformer core| ferrite magnet coreCore material: MnZn power ferrite material and MnZn high permeability ... ,DR,EC,PQ,RM ,UUAdvantage: 1.We can supply the core with matched bobbin.2.Supply with the service of grind ...