EFFECTIVE DESIGN THAT IS EASY TO INSTALL. Wedge style angled design ensures optimum sound absorbency. The acoustical barrier can be applied for permanent or temporary use. We suggest our Acoustic Foam Adhesive Square 24 Pack (available separately on Amazon) You can also use 3M General Purpose 45 adhesive spray, push pins, strong double sided tape, or 3M Command Strips, (not included). | HELPS WITH NOISE REDUCTION. Two inch thick foam is used to absorb mid to high frequencies and to control and trap echoes. Wedge style is comparable to eggshell foam and is best for when absolute sound deadening is not imperative, but moderate sound deadening is desired. | ECONOMICAL SOLUTION. Create a great listening or recording environment with the best value noise reduction products. SoundAssured foam squares are a low cost solution to get better recordings at home or in the studio. Acoustic panels are used for professional studios, rehearsal rooms, concert halls, podcasting, churches, home theaters, vocal booths, home studios, offices, man caves, dog kennels, utility closets, and more... | MADE IN USA AND CLASS-A FIRE RETARDANT. Our acoustic foam has Class A (Self Extinguishing) rating for ASTM E 84. | WHAT YOU GET: One bundle of four (4) 1' squares of 2" thick professional acoustic foam. Coverage is 4 square feet. Mix and match charcoal with our color foam. BUY MORE AND SAVE! 5% off orders of 8 units or more. 10% off orders of 15 units or more. Includes all SoundAssured products. COUPON CODES BELOW.