improved the acoustic performance as well as the appearance. The minimalist square shape has been designed with beveled edges. They perform well in absorbing the unwanted sound and at the same time provide a great decorative effect . You not regret buying our acoustic panel. Made with high-density material, soundproof foam panels effectively remove echoes and standing waves for crystal-clear sound. self-adhesive acoustic panels can be installed on walls, doors, , ceilings, and more without any tools. Plus, they're easy to cut to size without affecting performance. for professional studios, game rooms, video bloggers, rehearsal rooms, concert , podcasting, schools, home theaters, offices, pet kennels, and more. With adhesive, the color of the adhesive is random, no designation is accepted Colour:B:Black Material:Polyurethane Size:About 30x30x1cm Package Contents: 20 x Acoustic Foam Panels Only the above package content, other products are not included. Note: Light reflection 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.