large size soft ferrite cores big size core, EE ,EI ,EC, ETD ,UU ,UI, UYF ,T,PM . Material : H40 ,H44 ,H95 material : PC40 , PC44.high power low loss soft ferrite cores.transformer ferrite cores. big size core, EE ,EI ,EC, ETD ,UU ,UI, UYF ,T,PM .Material : H40 ,H44 ,H95 ferrite core