The Fair-Rite 2661666611 is a Ferrite Toroid Core designed for optimal performance in a wide range of electronic applications. Manufactured from Material 61, this core offers excellent magnetic properties. Its toroidal shape provides a closed magnetic path, minimizing flux leakage and maximizing inductance. Key specifications include an outer diameter (OD) of 16.6mm, an inner diameter (ID) of 9.65mm, and a height (H) of 6.35mm. This core is commonly used in inductors, transformers, and other magnetic components. As an authorized distributor of Fair-Rite components, Supreme Components International guarantees the authenticity and quality of this product. Choose the 2661666611 for reliable and efficient performance in your next project. Material 61 is a versatile material suitable for a broad range of applications.