SING F LTD10x Noise Suppressor Cable Clip-on Ferrite Ring Core RFI EMI 13mm Diameter Cable

Works well to prevent radio interference on my RG6 HD antenna wires. I put mine behind the wall plates to hide them.My rg6 wire thickness is about 9mm and these fit at 13mm a little loose. Not enough that they slide but it could've been tighter. Not sure how they measure these filters at the factory but it took my second try to get ones that fit.

New HID ballasts in my car created a lot of RF noise making am/fm reception very noisy and unlistenable (common problem BTW). I applied all the rings in the pack on the headlight wiring and problem is solved. Well, 98% solved, there is a BIT of whine but I just applied them willy-nilly. Proper looping of the proper cables at the proper point would likely solve it 100% but I'm happy and lazy.

These may work for RG-174 coaxial cable or smaller but that's it. From the Amazon description these are supposed to be 13mm ID which is basically 1/2" ID. I purchased two sets which I returned because of inaccurate product description.

excellent for rfi