The Fair-Rite 7895400421 is a Toroid Core designed for superior performance in a wide range of applications. Supreme Components International, an authorised distributor of Fair-Rite components, provides this core made from Material 43. Its toroidal shape ensures efficient magnetic flux containment, minimizing electromagnetic interference. Key dimensions include A = 12.7 mm, B = 7.3 mm, and H = 4.75 mm. This ferrite core is perfect for constructing inductors, transformers, and chokes. Material 43 offers a good balance of permeability and core loss, making it suitable for various frequencies. Choose this core for reliable and consistent results in your electronic projects. Trust Supreme Components International for genuine Fair-Rite products.