Acoustic Treatment: Bass traps aim to absorb low/mid frequency sound waves. Use it with our acoustic foam panels, will work together to reduce unwanted sound waves, reverberation and flutter echoes. All our bass traps and other acoustic foam products are made from polyurethane, flame retardant and environmentally friendly. It is safe to use in small rooms. APPLICATION: It is not a duplicate that you will get better acoustics and high-end style with our economical bass traps for . Not only ideal for treating sound on your studio walls, but also for recording studios, control rooms, rehearsal rooms, recording / podcasting, vocal booths, home theaters, home offices. Color: black Material: Polyurethane Size: about 7.5 x 7.5 x 30 cm Package Contents: 16 x Acoustic Foam Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/