The Fair-Rite 5978015901 is a high-quality Toroid Core, available through Supreme Components International, an authorised distributor of Fair-Rite electronic components. This ferrite core, crafted from Material 78, is designed for optimal performance in a range of applications. Its toroidal shape ensures efficient magnetic flux containment, minimizing electromagnetic interference. The core's dimensions are A = 15.9 mm, B = 9.5 mm, and H = 6.35 mm. This core is suitable for inductors, transformers, and other magnetic components. Choose Fair-Rite for reliable and consistent performance in your electronic designs. Supreme Components International guarantees authenticity and quality.