YOPIN Sound Absorbing Material 30cm x 30cm x 5cm Daiken Soundproofing Sheet Set Urethane Foam Sound Absorption Measures Interior Decoration Musical Instruments Soundproofing Noise Reduction Streaming Music Games Streamer Soundproof Room, etc. Noise Reduction Measures Sound Absorption Panel (1.08㎡ (12 pieces) Black (Pyramid Shape)) Set of 12 (6 more pieces under the first photo) New purchase, used item This is a set of sound absorbing material and soundproofing sheets. Soundproofing measures require a set of soundproofing and sound absorption. Normally, you would need to purchase them separately and apply them separately, which is a troublesome task, but since we have already adhered and combined the YOPIN sound absorbing material and Daiken soundproofing sheet, you can use them as is by simply sticking them on. 8 pieces are in their original shape 4 pieces were cut and used Total of 12 pieces. As a bonus, we will also include Daiken soundproofing sheet scraps. (There may be additions to the items in the photo) This is a product of amateur work, so there may be differences in size. Please refrain from purchasing if you are looking for professional-level quality. Since it has been used, there may be scratches, stains, and tacker marks. Please understand.