Highly fire retardant Made from High Quality Foam High density acoustic foam cell structure for maximum noise absorption Helps to flutter echoes and reduce excess reflections and reverberation Improves vocal clarity and acoustics of your room Applied to: Recording studios, Karaoke room,Piano room, Drum room, Anchor's room, Home Theater, KTV, Meeting rooms, Instrument rooms, etc. Colour: black Material: foam Size: 12cm x 12cm x 24cm/15cm x 15cm x 15cm Package Contents: 12 x bass trap wall foam sound insulation cotton 4 x Square foam sound insulation cotton NOTE: Dear buyer,Because of the large volume and quantity of this product, we ship it in compressed packaging. Compression packaging may cause you to find that the product becomes thin and wrinkled when you receive it. Please do not misunderstand that our products have quality problems. This is a normal phenomenon caused by compression. Just leave it in the air for a few days, or wash it with water and dry it, and it will quickly restore its original shape. Only the above package content, other products are not included. Note: Light 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.