4 RFI EMI Snap Ferrite CB Ham Radio RF Choke Filter Phone TV PC speaker noise Coax
will fit  1/4 inch cord,TV coax, and Rg58 59 or Rx 8x CB Ham Radio coax ,as well asseveral wraps of Speaker or Phone line.Use on TV Cable coax,Phone LinesPC speaker linesStereo Speaker cordsOr your Radio Antenna coax cordThese RFI EMI snap-on ferrite suppressor choke cores can be used for reduction orelimination of radio frequency interference from such sources as AM or FM radio stations,Ham and Amateur radio, CB radio, flourescent lights, electric motors, switching power supplies, computers, etc.The best way to use these is to clamp them to each and every wire entering and leaving the equipmentthat is being interfered with or (if possible)  the equipment that is generating the interference. Snap on chokes should be used very close to the equipment (wrap wire near equipment)RF ChokeRF choke kit to eliminate stray RF. Unsnap & wrap power cord or speaker wire around.Each additional wrap of wire is like adding another choke.Multiple chokes are often necessary to reduce or eliminate interference. Use trial and error method to see which wires are receiving the interference and snap these chokes on those wires. hole size is 0.25"You will receive 4 chokes