The Fair-Rite 2643003201 is a high-quality Ferrite Toroid Core, available at Supreme Components International, an authorised distributor. This core is constructed from Material 43, known for its versatile performance in a wide range of frequencies. The toroid shape ensures efficient magnetic flux containment, minimizing electromagnetic interference. With an outer diameter of 12.7mm, an inner diameter of 7.62mm, and a height of 4.75mm, this core is suitable for compact designs. Typical applications include inductors, transformers, and chokes. Choose Fair-Rite for reliable and consistent performance in your magnetic component designs. Supreme Components International guarantees the authenticity and quality of this Fair-Rite product.