Sonic Homework Acoustic Sound Foam kit, incl. 8 Sqft. 2-in. thick Wedge Foam with free adhesives, for studios and critical listening applications This kit includes 8 square feet of 2-inch Wedge foam in 24-inch by 24-inch panels Sonic Homework 2-inch Wedge-shaped acoustic foam is best for absorbing unwanted sound Sonic Homework Acoustic Foam has a density of 2.0lb per cubic foot, and is class-b flame-retardant Sonic Homework kits are shipped with premium adhesive tabs for installation. Just peel the backing and hang 'em up