Acoustic Soundproof Sound Stop Absorption Pyramid Studio Foam BoardSpecification:Material: SpongeSize: 50 x 50 x 3.5cm/19.7‘' x 19.7'' x 1.4''Color: Pink、 Sky blue、 Yellow、 BlackFeatures:Beautiful appearance and good acoustic characteristics.Eggs absorbing sponge、 dust-free and environmental-friendly.Light and soft、 no dust、 easy to use.Good sound effects、 suitable for studio and KTV etc.Pyramid shape、 provides little diffusion、 makes you sound more dynamic.Package Include:1 x Acoustic Soundproof Sponge