I have about forty (40) 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.
Plus postage in a padded envelope.
Minimum purchase of ten (10).