T44-2 Toroid Core MICROMETALS Brand OD = 0.440 in / 11.2 mm +/- 0.02 in ID =0.229 in / 5.82 mm +/- 0.02 in Ht = 0.159 in / 4.04 mm +/- 0.02 in AL=5.2 +/-5% 250 KHz - 10 MHz From bulk packaging, not in retail packaging.