Review on Quluxe Ferrites Double Ferrite Suppressor Car Electronics & Accessories by Brian Fisher

I found these rings very difficult to put on, usually takes a lot of tries, both hands, strong lighting and good luck. Rings from another manufacturer could easily be snapped on with one hand the first time. The only reason I bought them was because I wanted the 13mm size and not the reach. Since I finally managed to put them back in place (a process that took almost an hour instead of five minutes), I'm keeping them to myself. But I would recommend another manufacturer if you can find a ring of the size you need. Please note that these rings are most likely useless in a hard-to-reach area.