Twenty-five (25) new cylindrical ferrite beads for brute force RFI suppression, coax feedline shield RF radiation, etc. on HF. Use on RG-58A/U, RG-400 etc. in your mobile installation. Also, install on a loop on RG-122 etc. to multiply the impedance against feedline shield radiation. Maybe an inch long by 1/2" diameter. Nice fit on RG-58 etc. $.99/ea. Plus postage in a padded envelope. PayPal Only. Minimum purchase of ten (10).