Acoustic Treatment: traps aim to absorb the low/mid frequencies sound wave, Use it together with our acoustic foam panels, they will work together to reduce undesirable sound waves, reverb, and flutter echoes. All of our traps and other acoustic foam products are made from polyurethane, fire-retardant and eco-friendly. It is safe to use them in small-sized rooms. WIDE APPLICATION: It's no double that you will get better acoustics and the high end style with our cost effective traps for studio. Not only great for spot treating sound on walls in your studio but also for recording studios, control rooms, rehearsal rooms, /podcast recording, vocal booths, home theaters, home offices. Colour:black Material:Polyurethane Size:about 7.5 x 7.5 x 30cm 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 the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.