If you're trying to convert your garage, basement or shed into a functional practice space then you oughta jump on this screamin' deal. Included in this pack are two boxes of wall / ceiling acoustic foam and one box with a few corner wedges. This may not be all you need to insulate your space, but it's a heck of a place to start. Some pieces may have mastic residue on the backside. Dimensions listed are for the square panels, the corner pieces measure ~ 24"L and 12" from the corner.