Acoustical Tile, Ceiling, Width 24 In., Length 24 In., Thickness 5/8 In., Color White, Noise Reduction Coefficient (NRC) 0.55, Ceiling Attenuation Class (CAC) 35, Light Reflectance (LR) 0.85, Material Mineral Fiber, Resistant To Sag, Mold/Mildew, Bacteria; Class A Fire Retardant, Temp. Range (F) 32 to 120, Recycled Content 37 Percent, Application School/Classrooms, Healthcare, Corridors, Conference Rooms, Libraries/Band Rooms, Standards ASTM E1264, Package Quantity 16 Acoustical Ceiling TilesAll tiles are durable, sag resistant, and have a Flame Spread Index 25 or less. Smoke Developed Index 50 or less. Include a 30-yr. limited system warranty against visible sag, mold/mildew, and bacterial growth (excludes Cortega and Fissured products).Class A Fire resistance, according to ASTM E84 and CAN/ULC S102 surface burning characteristics. UL Classified.Fine FissuredProvide excellent sag resistance.