Specifications: Shape: Pyramid Dimensions: 12x12x2 inches Color: Black Material: Polyurethane Sponge Package Included: --36 pack of Acoustic Foam Panels --Mounting Instructions x 1 Features: --High noise reduction --Eliminate echoes & standing waves. --Increase sound clarity and quality. --Easy to install &remove. --Get better recordings and enjoy your life. Note: --These sound foam panels are vacuum sealed, pls split each other away and wait for a few hours to restore their normal shape. Remember not to mount panels before fully regained original size. If the edge parts are hard to restore, pls let these panels water-soaking for 1 minute and then wring dry. --The size may have 2-3mm deviation due to difference of measurement method or manual measurement. --Stickers and acoustic foam spray adhesive are not included.