- Nickel-zinc ferrite toroidal cores, black color, size 25x15x12mm (OD*ID*H) - Includes 20 units, designed for EMI/RFI filters, transformers, and electronic applications - Durable material, highly resistant to deterioration, with the ability to operate at high frequencies - Effective in suppressing electromagnetic interference and absorbing high-frequency noise - Improve the transmission of useful signals and protect against interference in electronic circuits - Versatile use in data cables, audio transformers, communications, control equipment, LED lighting, and automotive electronics - Easy to install, recommended for industrial projects and control applications - Optimized to reduce noise and improve the stability of electronic systems