The Fair-Rite 5977000221 is a solid round ferrite core made from 77 material. Supreme Components International is an authorised distributor of Fair-Rite components, guaranteeing genuine products and reliable performance. This core is designed for applications requiring effective EMI and RFI suppression. Its solid construction provides mechanical strength and consistent magnetic properties. The 77 material offers a good balance of permeability and saturation flux density, making it suitable for a wide range of inductor and transformer designs. This ferrite core is ideal for use in power supplies, filters, and other electronic circuits where noise reduction is critical. Choose Supreme Components International for your Fair-Rite component needs.