High quality clip on ferrite to suit up to 10mm ( RG-213 , RG-8 , LMR400 , SLMR400 )cable or wire
These fit onto 9mm to 10mm O/D coaxial cable with a nice firm fit. They are also ideal for USB cables with up to 4 turns of cable onto core eliminating noise from the device. May also help to stabilise SWR so that touching cable connectors no longer affects the SWR.