The Fair-Rite 3061990911 is a high-quality Ferrite Toroid Core, available through Supreme Components International, an authorised distributor of electronic components. This core is constructed from Material 61, known for its excellent performance in a wide range of frequencies. Its toroidal shape ensures efficient magnetic flux containment, minimizing electromagnetic interference. With dimensions of 6.1mm outer diameter, 3.5mm inner diameter, and 1.5mm height, this core is suitable for compact designs. Typical applications include inductors, transformers, common mode chokes, and noise filters. Choose Fair-Rite cores for superior performance and reliability in your electronic circuits. Supreme Components International guarantees genuine components and prompt delivery.