Self-Adhesive Design - The sound proof panels have double-sided tape behind them.(The color of the adhesive is random, 't accept the specified color.)Easy to Install.Just rip down the first layer of double-sided tape,you can paste in wherever you want. Widely Application - Play a important role for many occasions,not live sound treatment on studio and office walls,also for recording studios,home studios and anywhere you needed. Remarkable sound insulation effect - It can cut dowm noise and ,protect your privacy,aviod the noise effect others.You can more enjoy the time in studio & office. Environmentally Materials - Made of polyester fiber material, which is environmentally friendly and harmless, safe to breathe and touch,safe for adults, kids and pets.You can use it with confidence. Color: Silver Gray Material: polyurethane Package Contents: 12 x Acoustic Panels 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.