12 Pack- Acoustic Panels Studio Foam Wedges 1" X 12" X 12" Noise Reduction acoustic wedges Great for Recording Studio Sound Blocking Ideal to control echoes and reverb. Good for recording studios, vocal booths, control rooms. Spray Glue recommended for adhesion and also Flame Retardant Very Good Quality High NRC - One inch foam provides moderate sound control on walls or ceilings, especially ones not parallel to the floor. This product is best for when absolute sound deadening is not required, but moderate deadening is desired. foam tiles perfectly aligned, professional sound quality Consists of 12 PCS (6 tiles/pair)of 12 x 12 x 1 (1-inch) Acoustical Wedge foam panels Product Care: Occasional Vacuuming of Dust