https://ezauction.com/auctions/ktoesheo-12-pack-acoustic-panels-2-x-12-x-12-sound-proof-foam-panels-for-wallfireproof-soundproofing-wedgesnoise-canceling-sound-absorbing-foam-for-studio-recording-home-officeblack/
KTOESHEO 12-Pack Acoustic Panels, 2" x 12" x 12" Sound Proof Foam Panels for Wall,Fireproof Soundproofing Wedges,Noise Canceling Sound Absorbing Foam for Studio Recording, Home Office(Black)