Professional acoustic foam: acoustic panel is used to absorb and isolate noise, reduce the amplitude of sound vibration, and reduce noise pollution in life. High quality material: the sound insulation material is made of flexible sound absorption foam. Effectively reducing echoes and creating a good acoustic environment. Multiple scenes: foam pads measuring 30 x 30 x 2.5 cm/12 x 12 x 1 inch can be used in studios, recording studios, cinemas, concert , churches and government rooms. Colour:Black Material:foam sponge Size:30x30x2.5cm Package Contents: 24 * sound absorbers 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.