Topnisus [Pack of 10] Clip-on Ferrite EMI Cable Cores for Noise Suppressor Blocking RF-Interfere EMI-Interfere Improve Signal Integrity (20pcs with 5 Sizes)

Package included 20pcs ferrite core: each size with 4pcs content (3mm,5mm,7mm,9mm,13mm), Easy to install with double snap clips, For noise suppressor on USB, Firewire, Phone, Power Cord, Coaxial, Audio, Video etc cables, Package Included 10pcs ferrite ring core, Color : Black; Material : Plastic(Housing), Ferrite(Core)