[Are you tired of the noise in the room or office?]Acoustic panels will be definitely helpful to you.The total area of the 16 panels is 1.35(14.5 ft2). 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. [Compared with acoustic foam]Acoustic panels are machined by high- hot pressing, with much higher density: about 230kg/m.This creates better sound absorption ,higher impact resistance and convenient maintenance . 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 spray or double-sided adhesive tape(not include) on smooth and clean walls or ceiling, and make sure they do not fall off. [Eco-friendly and Flame-retardant]Our soundproof panels are made of polyester fiber, fireproof, odorless,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 + blue Material: polyester fiber cotton Size: Side length 17.5cm Package Contents: 8 * Silver gray sound insulation board 8 * Blue sound insulation board 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.