1 x FT-240-43 | FT240-43 Ferrite Toroid Core OD(A) = 2.40 in / 61.0 mm +/- 1.30 mm ID(B) = 1.40 in / 35.55 mm +/- 0.85 mm Ht(C) = 0.50 in / 12.7 mm +/- 0.50 mmAL=1075 +/- 20 % uH=(AL*Turns2)/1000 Actual measured AL using 10 turns #28 wire Application Freq Range Wideband Transformers 5 - 400 MHz Power Transformers 0.5 - 30 MHz RFI Suppression 5 - 500 MHz Ships Fast from California, USA