The Fair-Rite 4277353405 is a high-quality Toroid Core made from the popular 77 material. This ferrite core is designed for a wide range of applications, including inductors, transformers, and chokes. Its toroidal shape provides excellent magnetic properties and minimizes electromagnetic interference (EMI). Supreme Components International, an authorised distributor of Fair-Rite components, ensures that you receive a genuine product with full manufacturer support. The 77 material offers a good balance of permeability and saturation flux density, making it suitable for both power and signal applications. Trust Supreme Components International for all your Fair-Rite component needs.