I used to see them attached to doors etc. somehow and always thought it was something to take away. I stumbled across the video while looking for a way to deal with the small amount of light hitting the bottom corner of the door and figured that's why I threw these things away. Worked great, almost merged. The only thing they sent out was in a hard plastic case which I honestly thought was useless and wasteful considering I try to control these things today. They're just insulating wedges. The plastic case is definitely not needed.
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