i had the metal one once and found i had to keep pushing it back in as it would keep popping out. I also appreciate my air vents too much when the weather is warm so i fucked it off and now have a double pillar gauge holder and my 3rd gauge is in the blanking panel to the left of my steering wheel. Im sure i used to see plastic ones that were the whole unit of where the vents are. Probably not made anymore.