The 2643178651 is a high-quality Toroid Core from FAIR-RITE, a leading manufacturer of ferrite components. Supreme Components International is an authorised distributor of FAIR-RITE products, ensuring you receive genuine and reliable parts. This particular core is made from Material 43 and comes uncoated, offering flexibility in your design and application. Toroid cores are widely used in inductors, transformers, and other electromagnetic devices due to their efficient magnetic properties and self-shielding characteristics. Material 43 provides a good balance of permeability and saturation flux density. This FAIR-RITE toroid core is suitable for a wide range of frequencies and power levels. Trust Supreme Components International for all your FAIR-RITE component needs.