The 5975001821 is a Toroid Core from Fair-Rite, a leading manufacturer of ferrite components. Supreme Components International is an authorised distributor, ensuring you receive genuine, high-quality products. This particular core is made from 75 material, known for its specific magnetic characteristics. Toroid cores are widely used in inductors, transformers, and other electromagnetic devices due to their efficient magnetic flux containment. Choose Supreme Components International for reliable sourcing and expert support for all your electronic component needs. We guarantee authenticity and provide comprehensive product information.