The Fair-Rite 6678212021 is a Toroid Core designed for superior performance in a range of electronic applications. Supreme Components International, an authorised distributor of Fair-Rite components, provides this core which is crafted from Material 78, ensuring optimal magnetic properties. Its toroidal shape minimizes flux leakage and maximizes inductance. Key dimensions include an outer diameter (A) of 12.7 mm, an inner diameter (B) of 7.3 mm, and a height (H) of 4.75 mm. This ferrite core is perfect for constructing inductors, transformers, and chokes where efficiency and compact size are critical. Trust Fair-Rite quality and Supreme Components International's reliable supply chain for your component needs.