Mybecca 12 Pack Premium Pyramid Acoustic Wedge Studio Soundproofing Foam Wall Tiles (12 x 12 x 2 Inches) Consists of 12 PCS (6 tiles/pair) of 12 x 12 x 2 (2-inch) Acoustical Pyramid Wedge foam panels good for studios, recording studios, vocal booths, control rooms For big orders, please send a us a message thru Amazon Contact Seller (MYBECCA) Very Good Quality High NRC!! Product Care: Occasional Vacuuming of Dust