12 Pack of Charcoal / Blue 2 Inch Studio Acoustic Model # SA-FMDM2-Blue-Black-6Each 12 Pack of Charcoal / Blue 2 Inch Studio Acoustic Foam Sheets 6 Charcoal Tiles and 6 Blue Tiles Reduce echo and standing waves in your recording studio, practice room, or live venue Dimensions: 2" x 12" x 12" each