The Fair-Rite 5977011101 is a high-quality 77 material toroid core, available at Supreme Components International, an authorised distributor of Fair-Rite components. This ferrite core is designed for a wide range of applications, including inductors, transformers, and noise filters. Its toroidal shape provides excellent magnetic properties and minimizes electromagnetic interference (EMI). The core's dimensions are A = 11.1 mm, B = 6.35 mm, and C = 4.75 mm. The 77 material offers a good balance of permeability and core loss, making it suitable for both signal and power applications. Choose this toroid core for reliable and efficient performance in your electronic designs. Supreme Components International guarantees the authenticity and quality of this Fair-Rite product.