Case 3M rubber stickers use?

NunoAntunes

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Jul 2, 2014
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Hey!
Well, this is more kind of a curiosity. When I assembled my computer, my Cooler Master case (think it was the case but not sure. Anyways, full build is in signature) came with some odd stickers (3M Electronics ones, made of black rubber or something similar).
I had never heard about anything like them, anyone knows what they are for? I cannot find any info online and I'm kind of curious :p
The first ones are circular, with a circular hole in the middle (kind of like a circular crown). They are like 1 cm diameter with a 0.8cm diameter hole.
The other ones are way larger and L shaped (a bit different from one another) and 9cm x 4cm. They have some holes in them. One in each end of the L and one in the angle of it.

Anyone's got a clue what they might be used for?
I appreciate any help you can provide.
 
Since you didn't provide the model # of the case, it's impossible to tell for sure but I suspect they are feet to go on the bottom of the case to provide vibration damping and non-skid functionality. See photos at the following link
CM Force 500

They may also be grommets to pad holes and corners where cables are routed through the case.
 

NunoAntunes

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Jul 2, 2014
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Nope, feet already padded. These are too small. It's a Silencio 550.
Not very happy with it tbh.
 

NunoAntunes

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Jul 2, 2014
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Well, here's the picture of the things.
gHQPIUn.jpg

The material's rubbery and the circular things come out of that rectangle. They are circular crowns with a 1 cm diameter and hole with 0.8 cm diameter.