I ordered a mirror and had it professionally hung but before taking it out of the box the person found that what Wayfair provided to hang it on the wall was inadequate and would not have held the weight of the mirror on the wall.  I cannot take a pic of the pack because I lost them but the pack is a see-through reddish orange pack. So he was able to provide something much stronger to make sure it would not come down.  I paid $90 for him to do that.  Also, on the back of the mirror, it was broken badly but it could not be seen from the front.  I really don't believe it will cause a problem since it is inside and is not subject to the cold and hot elements.