1.5" Acoustic Foam Egg Crate - 1-1/2" 72" x 80" covers 40sq Ft - SoundProofing/Blocking/Absorbing Acoustical Eggcrate Foam - Made in the USA! 1) 1-1/2" Thick x 72" x 80" Charcoal Color - Covers Approx 40sq Ft High NRC Rating of .67 Made in the USA! Excellent For Speaker Cabinets - Studio's & More!