AK TRADING AF-2x12x12-24 Soundproofing Foam Acoustic Tiles Studio Foam Sound Wedges, 2" H x 12" W x 12" L, 24 Pack Consists of 24 PCS (12 tiles/pair) of 12 x 12 x 2 (2-inch) Acoustical Wedge foam panels Solid foam base for maximum absorption Class A Fire Retardant Very Good Quality High NRC!! Product Care: Occasional Vacuuming of Dust