HELP WHAT MATERIAL IS SAFE TO USE UNDER A MOCRWAVE? IS THIS SAFE TO PUT UNDER MT MICROWAVE OR IS IT FLAMMABLE?

HELP WHAT MATERIAL IS SAFE TO USE UNDER A MOCRWAVE? IS THIS SAFE TO PUT UNDER MT MICROWAVE OR IS IT FLAMMABLE?
Im putting a sticker tile on my counter as I’m remodeling my kitchen area. The sticker feels like plastic but I don’t see any aluminum. On the back it says stay away from babies or anywhere with a lot of heat. It’s a fake file sticker supposed to be used to decorate kitchen walls.
HELP WHAT MATERIAL IS SAFE TO USE UNDER A MOCRWAVE? IS THIS SAFE TO PUT UNDER MT MICROWAVE OR IS IT FLAMMABLE?
This is my microwave. I also have a metal hood bowl which shouldn’t be on top of the microwave either lol
HELP WHAT MATERIAL IS SAFE TO USE UNDER A MOCRWAVE? IS THIS SAFE TO PUT UNDER MT MICROWAVE OR IS IT FLAMMABLE?
HELP WHAT MATERIAL IS SAFE TO USE UNDER A MOCRWAVE? IS THIS SAFE TO PUT UNDER MT MICROWAVE OR IS IT FLAMMABLE?
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