*This is Noise Ferrite Cores 9.0mm(0.35inch) inner diameter: Suitable for 0.27 - 0.35inch ( 7-9mm) cables,can be widely used in a variety of Clip them on Application: HDMI/VGA/DVI cable, Power audio/Loudspeaker/Radio/Cords, Subwoofer/Amplifiers/Mixer Console line,home theater Device cords, Industrial Equipment Cords etc. | *These snap-on ferrite cores are superb at reducing high frequency interference caused by home appliances and electronics. | *Easy to install with double snap clips,Just snap it on and you will get clearer signal and faster data transmission. | *Erase noise that is generated by a portable device or Other Device,Reduce electro-magnetic interference and improve signal integrity. | *The ferrite cores come in two split halves, and clamp on to the cable whether it has a connector, or is hard wired to equipment. Install the ferrite core at the equipment side of the cable. If a cable has equipment that needs to be protected on both sides, install one at each end.(Depending upon circumstances, identifying and troubleshooting both of affected and offending devices are necessary for successful installation.)

*This is Noise Ferrite Cores φ5.0mm/0.2inch (inner diameter): Suitable for 0.14 - 0.2inch (φ3.5mm- 5mm) cables,can be widely used in a variety of Clip them on Application: Car DVR, Loudspeaker cable, Mouse cable, Keyboard cable, USB cable,AV cables,Video cable,audio cable etc. | *These snap-on ferrite cores are superb at reducing high frequency interference caused by home appliances and electronics. | *Easy to install with double snap clips,Just snap it on and you will get clearer signal and faster data transmission. | *Erase noise that is generated by a portable device or Other Device,Reduce electro-magnetic interference and improve signal integrity. | *The ferrite cores come in two split halves, and clamp on to the cable whether it has a connector, or is hard wired to equipment. Install the ferrite core at the equipment side of the cable. If a cable has equipment that needs to be protected on both sides, install one at each end.(Depending upon circumstances, identifying and troubleshooting both of affected and offending devices are necessary for successful installation.)

*This is Noise Ferrite Cores 7.0mm(0.28inch) inner diameter: Suitable for 0.2 - 0.27inch (5mm-7mm) cables, Can be widely used in a variety of Clip them on Application: HDMI cable, VGA cable,AV cable,DVI cable, Coaxial audio cable, Audio Power Line, Loudspeaker cable,home theater Stereo Audio System,Amplifier,Subwoofer,Bass cable IP Serial Port Camera Industrial Cable etc. | *These snap-on ferrite cores are superb at reducing high frequency interference caused by home appliances and electronics. | *Easy to install with double snap clips,Just snap it on and you will get clearer signal and faster data transmission. | *Erase noise that is generated by a portable device or Other Device,Reduce electro-magnetic interference and improve signal integrity. | *The ferrite cores come in two split halves, and clamp on to the cable whether it has a connector, or is hard wired to equipment. Install the ferrite core at the equipment side of the cable. If a cable has equipment that needs to be protected on both sides, install one at each end.(Depending upon circumstances, identifying and troubleshooting both of affected and offending devices are necessary for successful installation.)