Features:Main FunctionClamped on the signal line to play the role of anti-interference and electromagnetic compatibility; clamped on the power line to stabilize the current and improve the sound quality.More AdvantagesImprove the electromagnetic field around the solenoid, thereby avoiding external interference; it will not cause distortion of the transmitted signal and will not affect your audio.Wide ApplicationApplied to all kinds of electronic connection lines, wiring harnesses, home appliances, like AV cables, coaxial audio, audio power lines, IP serial cameras, etc.Main Material Made of nickel zinc ferrite, with good performance, high efficiency and long life. Easy to install, easy to use, and can be disassembled.Size DetailsThe size of ferrite core ring about size(l*w*h): about 30.17x14.34x16.44mm/1.19x0.56x0.65inch, hole dia: 7.02mm/0.28inch, applicable cable size: 5-7mm/0.2-0.28inch.Specifications:Type: Ferrite Core RingMaterial: Nickel Zinc FerriteColor: BlackSize(L*W*H): About 30.17x14.34x16.44mm/1.19x0.56x0.65inchHole Dia: 7.02mm/0.28inchApplicable Cable Size: 5-7mm/0.2-0.28inchPackage Included:5pcs x Ferrite Core RingNote:1. Due to the light and screen difference, the item& 039;s color may be slightly different from the pictures.2. Please allow 0.5-2 cm differences due to manual measurement.