SpecificationSize: 9mm (Suitable for 7.0-9.0mm cables); Package Includes: 10 x Ferrite Core Ring Improve Signal IntegrityThe ferrite core helps in reducing high frequency interference caused by home appliances and electronics Easily InstallClip on ferrite chokes with self-adaption clip can mount on cables tightly and work for a super long time Wide ApplicationSuitable for AC power lines, USB cable, mouse cable, keyboard cable, headset cable, video cable, audio and data cable, etc. ReusableMini shape and removable. It won't cause any distortion during signal transmission