The Fair-Rite 6678211621 is a Ferrite Toroid Core designed for a wide range of electronic applications. Manufactured from Material 78, this core offers excellent performance characteristics. Its toroidal shape provides efficient magnetic flux containment, minimizing electromagnetic interference (EMI). The core's dimensions are 7.8 mm (outer diameter), 2.1 mm (inner diameter), and 1.6 mm in height. Supreme Components International is an authorised distributor of Fair-Rite components, ensuring that you receive a genuine and high-quality product. This core is suitable for use in inductors, transformers, and other magnetic components. Material 78 is known for its high permeability and low core loss at higher frequencies. Consider this core for your next design requiring a reliable and efficient ferrite component.