Feature: 1. Nickel-zinc ferrite. It can improve the electromagnetic field around the solenoid, thereby avoiding external interference; 2. Easy to install, easy to use, can be disassembled, and there is an elastic clip on the port; 3. Good performance, high efficiency and long life. Placing it near the electromagnetic source can more effectively improve the signal quality of audio and video; 4. The cable clip will not cause distortion of the transmission signal, nor will it affect the quality of your audio, video and pictures. Specification: Product material: nickel zinc ferrite Product specifications: inner diameter: 3.5mm/5mm/7mm/9mm/13mm (1) 3.5mm / 0.14in (inner diameter): suitable for 0.06-0.14in / 1.5-3.5mm cables Application: Car DVR, headset cable, speaker cable, mouse cable, keyboard cable, USB cable, etc. (2) 5mm / 0.2in (inner diameter): suitable for 0.14-0.2in / 3.5-5mm cables Application: car DVR, speaker cable, mouse cable, keyboard cable, USB cable, RS232 serial port camera cable, etc. (3) 7mm / 0.27in (inner diameter): suitable for 0.2-0.27in / 5-7mm cables Application: AV cable, coaxial audio, audio power cord, IP serial camera, etc. (4) 9mm / 0.35in (inner diameter): suitable for 0.27-0.35in / 7-9mm cables Application: HDMI-compatible cable, VGA cable, DVI cable, power cord, speaker cable, industrial cable, etc. (5) 13mm / 0.51in (inner diameter): suitable for 0.35-0.51in / 9-13mm cables Application: HDMI-compatible cable, IP communication cable, DVI cable, super-speed VGA cable, etc. Product color: black Product Usage: (1) Clamp on the signal line to play the role of anti-interference and electromagnetic compatibility (2) Clamp on the power cord to stabilize the current and improve the sound quality Scope of application: applied to all kinds of electronic connecting wires, wiring harnesses, home appliances, air conditioners, computers, inverters, electric welding machines, power cords, etc. Loosening effect.) Note: There may be slight size deviations due to manual measurement, different measuring methods and tools. The picture may not reflect the actual color of the item because of different photographing light, angle and display monitor. 22pcs Include: 4 X 3.5mm Ferrite Rings 5 X 5mm Ferrite Rings 8 X 7mm Ferrite Rings 5 X 9mm Ferrite Rings 50pcs Include: 10 X 3.5mm Ferrite Rings 10 X 5mm Ferrite Rings 10 X 7mm Ferrite Rings 10 X 9mm Ferrite Rings 10 X 13mm Ferrite Rings 10 X 13mm Ferrite Rings _x000D_