■ Shapes include toroidal, drum, EI and ER type

　　■ Height varies from as low as 2.5 mm up to 7.5 mm nominal

　　■ Inductance ranges from 0.330 micro henries to 10,000 micro henries

　　■ Current range from 30 amps down to 20 milli amps of rated current

　　■ Energy storage as high as 980 micro-Joules can be obtained is less than 1 cm3