Without Damaging Your Wall: Our acoustic foam panles are equipped with 300 PCS double side 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. | Noise Reduction: Overall Noise Reduction Coefficient (NRC): 0.65. The wedge surface of -6 grooves increases the contact area with sound waves, and the sound absorption effect is better than other shapes of surfaces. Will help reduce sounds and allow you to practice any musical instrument, watch movies, play games or listen to music without disturbing anyone. | High Density 25Kg/ : 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. | Easy to Install: Our acoustic foam panle can be used as acoustic cover for walls, ceilings and doors. One wedge needs 5 pieces of tape. Each tile is 1 square foot of 2 inch thick acoustic wedge.