Specification Material: polyurethane foam Color:AS the picture shows Features The sponge is non-toxic, tasteless and safety The sponge is the best tool use for sound insulation, sound-absorbing. It can be used in sound recording studio, control room, home theater, ktv, and many other places. Sound-absorbing sponge is base on sponge for further processing, noise can be absorbed beacause it is reflected in the sponge which do not spread outside. Package included: 1x foams Notice: Please allow 1-3cm error due to manual measurement and make sure you do not mind before ordering. Please understand that colors may exist chromatic aberration as the different placement of pictures. The merchant warrants that their products comply with all applicable laws, and are offered only if they comply with Joom's policies and EU Product Safety and Compliance laws.