high power and low loss ferrite cores material : H40 ,H44 ,PC95 EE,EC,EI ,UU,UI,UYF ,PM ,T ,I core. material : PC40 ,PC44 ( N87 ) material : H40 ,H44 ,PC95EE,EC,EI ,UU,UI,UYF ,PM ,T ,I core. Use : transformer , welding machine , induction heating ,switch power , converter ,speaker . high power and low loss ferrite cores