30x15x6mm "E". Ferrite cores
Ferrite cores used for traditional analog communication and modern digital communication: power transformers, current transducers, instrument transformers, inductors, chokes, ballasts, voltage stabilizers and regulators, welding transformers, broad band transformers, filters, old PC as ferrite memory, etc.. Good for any high-end audio, video, Microphones, band instrument or computer system.
Ferrite core is generally stored near signals of place. With high-temp resistant and corrosion resistant.
It has isolation eddy current, low permeability and constant magnetic characteristics.
Ferrite Core, type: "E"
Condition: new, factory box
Type of Material: M1000NM
Color: Dark Gray
Overall Size: 30x15x6x5x6 mm
Manufactured: plant of Ferromagnetic Alloys, Russia
Net Weight: 11g
More info about ferrite cores here.