The Auralex SFIBER-ROLL-BLK is a 2" x 48" x 300" 25 foot roll of SonoFiber in black. SonoFiber is the perfect solution for those budget-conscious projects requiring a Class A fire rating without the aesthetic demands of designer treatments such as fabric-covered panels. SonoFiber is ideal for nightclubs, restaurants, gymnasiums, houses of Worship, multi-purpose rooms and any other commercial or industrial environment where aesthetic concerns are secondary to performance and safety.