The Fair-Rite 2661666611 is a Ferrite Toroid Core, expertly crafted from Material 61. This core is designed for a wide range of applications, including inductors, transformers, and noise filters. Its toroidal shape provides excellent magnetic properties and efficient flux containment. With an outer diameter (OD) of 16.6mm, an inner diameter (ID) of 9.65mm, and a height (H) of 6.35mm, this core offers a balance of size and performance. Supreme Components International is an authorised distributor of Fair-Rite products, ensuring you receive genuine, high-quality components. Material 61 is a versatile material known for its high permeability and low core loss at higher frequencies. This makes the 2661666611 an excellent choice for demanding applications where performance and reliability are critical.