Overall Noise Reduction Coefficient (NRC): 0.59 Good for Recording Studios, Vocal Booths, Home Theaters Used to acoustically treat walls or, most commonly ceilings (especially if they aren' parallel to the floor) Light Weight Soundproof Foam easy can be applied on Ceilings. Soft / Flexible - even great for sound proof padding sound insulation sound dampening (Camera accessories, Go-Pro etc.) that provides strong noise reduction over a wide range of frequencies. These panels enhance the sound and speech within a room. Each pad can provide decent noise reduction and can also be used as foam padding in various cases due to flexible integration choices. Can also provide sound absorption noise inside a computer chassis. colour: Black + blue Material: foam size: 30*30*3.8cm Package Contents: 6*Sound insulation cotton Note: Can help increase sound in a room or space. Great Use For Media Content (You Tubers / Music Edit & Recording, Video Gamer). Only the above package content, other products are not included. Note: Light 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.