Features: High-quality acoustic foam panels dimension is 30 * 30 * 2.5cm/ 12 * 12 * 1in pack of 12pcs or 24pcs for option and 3 colors(dark grey/light grey/red) for choices. Help to reduce reverb flutter echoes undesirable acoustic reflections and unwanted noises to create an excellent listening or recording environment for you. Suitable for using in small and medium-sized rooms such as recording studios control rooms home studios home entertainment theaters home offices games rooms etc. Adopts high density eco-friendly and fire-proof material each piece of foam panel has 11 slots better sound absorption performance and better audio recording quality. Note: The acoustic foams may be a little deformed caused by packaging you can put them in a ventilated place for 24H or soak the foam in water for 1min then drying the foam by natural wind or a hair dryer. Specifications: Color: Dark Grey/ Light Grey/ Red(optional) Quantity: 12pcs/ 24pcs(optional) Item Size: 30 * 30 * 2.5cm/ 12 * 12 * 1in Packing List: 12 * Pieces of Acoustic Foams