Acoustic Foam Lg 12 Pack Room Kit - Wedge 3" 24" x 24" covers 48sq Ft - SoundProofing/Blocking/Absorbing Acoustical Foam - Made in the USA! 12 Pack Special! 3" Thick x 24" x 24" Charcoal Color - Covers 48 sq Ft High NRC Rating of .88 Excellent in the low-mid/mid/high freq's Made in the USA! Meets ASTM E84 Class A and California 117 flame retardant specifications