Without Damaging Your Wall: Our acoustic foam panles are equipped with adhesive tape which can be easily washed. It is easily removable and will not damage your walls or surfaces, tear off without leaving any traces. Will help reduce sounds and allow you to practice any musical instrument, watch movies, play games or listen to music without disturbing anyone. Our acoustic foam are made from a non-toxic, fireproof and high-density polyurethane material. Passed the environmental protection, is a safe and reliable product. Note: Our acoustic foam is compression transportation, has to be placed in a ventilated place waiting for 2 days to return to normal size. Wide Application: For professional acoustic control, sound absorption and reverberation reduction. Suitable for your studio or office, home/recording studios, vocal booths, control rooms, home theaters, professional movie theaters, concert halls, and more. Ideal for both home studio and professional use. Colour:black Material:Polyurethane size:30x30x5cm note:With small adhesive backing, the color and style of adhesive backing are random, don't accept the specified color and style Package Contents: 24 * acoustic panel / 12 * acoustic panel 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.