Plastic or Metal Structured Media Boxes - in wall

Hi all,

I’ve got to install a structured media enclosure above my fireplace for a Frame TV. The enclosure needs to house the special box the Frame TV comes with. The box will be recessed into the wall.

My question is should I use a metal or plastic media enclosure. Is one more secure/safe than another?

Here are my options that I’m looking at:

Metal: https://www.leviton.com/en/products/47605-140

Plastic: https://www.legrand.ca/audio-visual/rac ... ?locale=en