Each sound-dampening panel is a regular hexagon with beveled edge. They can absorb and dampen noise or , create a quiet environment , and can also be used as wall decorations to decorate your room or office. [Better sound absorption and Convenient maintenance]Compared with acoustic foam, it is machined by high-tech hot pressing, with much higher density: about 230kg/m.This creates better sound absorption and higher impact resistance of our acoustic panel. Besides,you can easily use a vacuum cleaner or duster to remove dust, or use a damp towel and detergent to wipe stains. [Easy to cut and Install]You can use a utility knife to cut them at will before installation. Just easily attach them with glue or double-sided adhesive tape on smooth and clean walls or ceiling, and make sure they do not fall off. (Due to the high cost of the product itself, the package does not contain glue or tape.) [Eco-friendly and Flame-retardant]Our soundproof panels are made of 100%Polyester cotton, fireproof, odorless, non- and formaldehyde-free, no harm to health. Also can be recycled and reused. With flame-retardant grade: B1. [Widespread use]with professional acoustic control and acoustic processing, our sound absorbing panel is to reduce the noise, reverb and at bedrooms, home theaters, vocal booths, home studios, offices, and in professional studios, concert , theaters, conference , rehearsal rooms,classrooms. Colour:Silver gray Material:Polyester cotton Size:Side length 17.5cm Package Contents: 16 * Soundproofing Foam Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.