Quality soundproofing material it's retardant, odorless, safe, rustic resistant, and fade resistant, giving you use sound proofing padding set has simple color assortment, easy to match decoration styles, suitable for decorating your recording studios, control rooms, offices, home studios, home theaters, home offices and more; It is for spot treating sound, safe to touch and breath the beveled edge soundproof padding can be attached to a of surfaces, such as wall, doors, windows, ceiling floors and more; the surface is clean and dry starting, then, simply attach the panels with adhesive taps and nails (which are not included) with acoustic control, sound suppression, acoustic processing, and noise reduction functions, the high density dampening panel is to reduce the waves, reverb and in small and medium-sized rooms, improving the sound quality of your room, but it 't block the loud sound from the other room Colour:As Shown(Light gray + dark gray + white) Material:Polyester Size:One side is about 17.5cm long Package Contents: 18 * Acoustic Panels(6 light gray, 6 dark gray, 6 white) 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.