21-Pack Black Adhesive Soundproof Acoustic Panels for Room Noise Dampening — 12'' x 12'' x 0.4''

These black acoustic panels are made from high-density polyester fiber (380kg/m³) and carry a B1 flame retardant rating for reliable safety and durability. Each pack contains 21 pieces, with individual panels sized 12'' x 12'' x 0.4''. Built-in adhesive backing lets you mount them quickly without using extra glue or nails. They noticeably cut down on noise and echo to improve audio clarity in rooms, offices, and studios, and their versatile design suits walls, ceilings, and windows for both soundproofing and decorative applications.