Feature:  Features with Flame retardant;  Our 3D acoustically designed 2.8-inch foam helps break up sound waves and provide ideal moderate sound control on the wall or ceiling.  Our foam board is compressed by vacuum packaging and quickly returns to its normal size. It can be placed in a well-ventilated place for about 24 – 48 hours, or soak the foam in water for one minute, then wring out the moisture and use a hair dryer or Let it air/dry.  Soft sponge, no dust, high density;  Sound-absorbing sponge with beautiful appearance and good acoustic characteristics, its greatest feature is: due to its shape, it provides little diffusion, it makes you sound more dynamic.  Very suitable for live therapy sound on the walls of studios or offices-used in recording studios, control rooms, office home studios, home entertainment theaters, home offices. Easy to shape and cut, modification will not affect performance.     Specifications:  Material: High quality foam.  Color: Black.  Size: 30x30x7cm/12x12x2.8in.  Quantity: 6 Pcs/ Set.  Weight: 454g.     Note:  Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid.  Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you      Package Included:  6 x Soundproof foam