The gray Broadway Acoustic Control Column Panels from Primacoustic, which come in a pack of 8, are fabric-covered acoustic panels designed to provide an acoustic treatment where you want to control primary reflections, eliminate flutter echo, and reduce standing waves. The panels are made from high-density 6 lb per cubic foot glass wool. Each panel is fully encapsulated with micromesh and the edges are resin-hardened to assure safe handling during installation. The beveled-edge panels are covered in an acoustically transparent fabric. The Broadway panels are laboratory-tested for acoustic performance and Class-A/I fire-safe by meeting ASTM-E84 and Can-UL S102 requirements for flame-spread and smoke development.