The Fair-Rite 5977001821 is a high-quality Ferrite Toroid Core, expertly crafted from Material 77. This core is designed for optimal performance in a wide range of electronic applications. Its dimensions include an outer diameter (OD) of 18.29mm, an inner diameter (ID) of 11.43mm, and a height (H) of 6.35mm. Material 77 provides excellent permeability and minimizes core loss, ensuring efficient and reliable operation. Toroid cores are commonly used in inductors, transformers, and filters. As an authorised distributor of Fair-Rite components, Supreme Components International guarantees the authenticity and quality of this product. Choose the 5977001821 for your next project and experience the Fair-Rite difference.