Since 1962 the industry has known Torelco as a partner that supplies electric coils and transformers of superior quality. Toroids from .093in. inside diameter to 15in. outside diameter wound using wire sizes from 7 AWG through 46 AWG in open or cased styles, varnish or epoxy encapsulated. We offer custom coils, solenoid coils, ferrite core coils & toroid wound coils to serve a range of industries.