All choke coils in this series are the same size as the unit illustrated. Leads are of No. 21 tinned wire. Values from 39 uH to 470 uH are wound on phonolic forms. Values from 560 uH to 1500 Uh are wound on iron core forms. Tolerances are +/- 10%. All uni ts are impregnated with thermosetting varnish and are EIA color coded.