1.EFD ferrite core 2.range:EFD,EF,EE,EPC,ER,PQ,RM,UU, ... ,DR 3.Supply grind gap and matched bobbin ferrite core| soft ferrite core| transformer core| ferrite magnet coreCore material: MnZn power ferrite material ... ,DR,EC,PQ,RM ,UU EFD FERRITE CORE SERIES Advantage: 1.We can supply the core with matched bobbin.2.Supply with the ...