U.S. buyer attention: The areas where the US warehouse does not deliver goods are: Hawaii, Alaska, Puerto Rico, Guam and other US overseas territories. And the military address. Spanish buyers attention: if your address includes following postal code please do not choose the Spanish warehouse. The zip code starts with 35/38. Overseas warehouse cannot be delivered. 25x Ferrite Core Ring Clamps Kit 3.5mm/5mm/7mm/9mm Clip On Cable Connector Noise Filters Suppressor 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 an 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. 5. Application: Applied to all kinds of electronic connecting wires, wiring harnesses, home appliances, air conditioners, computers, inverters, electric welding machines, power cords, etc. (Note: When the wire is too thin, you can wind a few more turns at the magnetic ring to achieve Loosening effect.) Specification: Material: Ni-Zn Ferrite Inner diameter: 3.5mm/5mm/7mm/9mm Introduction: (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-compatible cable, VGA cable, DVI cable, power cord, speaker cable, industrial cable, etc. Colour: Black 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 current and improve sound quality. Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-3mm measuring deviation due to manual measurement. Packages: 7 X 3.5mm Ferrite Rings 5 X 5mm Ferrite Rings 8 X 7mm Ferrite Rings 5 X 9mm Ferrite Rings 1. All items will be double checked and well packed before sending. Items will be dispatched within 3-7 business days after customers pay the order. Because we have thousands of order everydays. We need to arrange