SPECIFICATION: Size - 13.8 X 11.8 X 2 inches, pack of 12; Coverage - 10.26 square feet; Weight - 0.13 lbs per panel; Material - Thick and high density polyurethane; Design - hexagon beveled edge EXCEPTIONAL REVERB & NOISE REDUCTION: Crafted with premium open cell foam and unique hexagon structure, these acoustic absorption foam panels are excellent at diminishing room reverb, echo, standing waves, and noise. When applied to walls and ceilings, they are highly effective in cancelling sound reflections to improve the sound clarity in the space. NRC (Noise Reduction Coefficient): 0.8; Average Absorption Coefficient: 0.77 FLAME RETARDANT & ECO-FRIENDLY: Our sound proof foam wall panels are flame retardant (California Technical Bulletin 117-2013), odorless and non-toxic. Their high density, durable, and high resilience design ensures long-lasting performance. Besides, these modern style foam tiles are perfect for interior wall and ceiling art decoration