... magnetic leakage, 4>low humming, 5>compact dimensions and light weight. Material: It is made of 0.05mm,0.08mm,0 ... : The magnetic property is the best, for the structure is toroidal, and the flux path is completely closed, no magnetic leakage ... . Using toroidal winding machine make wind easy and efficient.Application : Toroidal cores are widely used in 50Hz ...