Features:*100% brand new and high quality.*Sound-absorbing sponge is on the basis of sponge for further processing, acoustic inside the sponge and reflection of the increase in the number so as to achieve the noise, sound-absorbing effect.*Soft sponge, no dust, high density.*Excellent Elasticity. Non-toxic.Powerful sound absorption.*Designed for durability and easy installation.*Square sound-absorbing sponge with beautiful appearance and good acoustic characteristics.*Used to absorb mid to high range frequencies and diminish echoes. Overall Noise Reduction Coefficien.*Good for studios, recording studios, vocal booths, control rooms. Specifications:Size: about 25*25*5cm/10*10*2inchMaterial: Polyurethane spongeType: Acoustic FoamColour: Black(As shown)Quantity:12pcsPackage list:12 x Soundproof FoamNote:Please allow 1-5mm error. Due to the difference between different monitors,the picture may not reflect the actual color of the item. Thank you! The product is deformed due to logistics extrusion. Don#39; t worry, it can be restored to its original shape after being placed for a period of time, and it can be quickly restored by immersing in water.