Flame Retardant (Class B1) | Enviromentally-friendly | Odorless REMARKABLE ACOUSTIC PERFORMANCE: Innovative Periodic Groove Structure for Much Better Broadband Absorption Ability | High : 0.75 MULTIPURPOSE: | Reverb Control | & Standing Wave Cancellation| Clarity Improving | Noise Reduction|, etc. Perfect for recording studio, isolation shield, home theater, office, etc EASY TO CUT & SET UP: adhesive works nicely Product description:Sound Absorbing Foam is a great broadband sound absorber. Appealing outlook, exceptional acoustic performance as well as reasonable price all exactly the for room acoustics. Great for DIY:Light weight, small size, easy installation... All the elements a simple thing to design your own absorption zone as you want. Colour:black Material:Polyurethane Size:30 x 30 x 5cm Package Contents: 24 x Soundproof Foam 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.