The Fair-Rite 9578100502 is a high-quality Toroid Core, meticulously manufactured from Material 78. Supreme Components International, an authorised distributor of Fair-Rite components, provides this core for applications requiring efficient magnetic properties. Key dimensions include an 'A' value of 12.7 mm, a 'B' value of 7.3 mm, and a height ('H') of 4.75 mm. This toroid core is well-suited for constructing inductors, transformers, and chokes, offering superior performance in filtering and energy storage circuits. Its toroidal shape ensures minimal flux leakage and high inductance. Trust Fair-Rite and Supreme Components International for your ferrite core needs.