The Fair-Rite 5977004901 is a solid round ferrite core made from the popular 77 material. Supreme Components International is an authorised distributor of Fair-Rite products, guaranteeing authenticity and quality. 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 frequencies. This ferrite core is commonly used in inductors, transformers, and filters to improve signal integrity and reduce unwanted noise. Trust Supreme Components International for your ferrite core needs.