Acoustic Foam XL Bass Trap Studio Soundproofing Corner Wall 12" X 12" X 12" (4 PACK) Size: 12" (base) X 12" (height) X 12" (width) 4 PACKS = 4 PCS; 2 BLOCKS Use for dampening and absorbing low frequency sound waves. Good for studios, recording studios, vocal booths, control rooms, your own music room Product Care: Occasional vacuuming. For better decoration, can be wrapped with vinyl, linen, or microsuede