Acoustical Ceiling TilesA variety of edge types and surface textures to help you create the look you want. All 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 Fissured, Cortega, and Designer products).Class A Fire resistance, according to ASTM E84 and CAN/ULC S102 surface burning characteristics. UL Classified.Georgian™ High Washability and Clean Room VLUnperforated Class 5 (Class 100) tiles offer high wash and scrubbability, and soil resistance. Impact and scratch resistant.Meet USDA/FSIS guidelines for food processing areas.Fine Fissured, Fissured, Dune, Clean Room VL, and CortegaProvide enhanced resistance against structural failure during a fire when used with Fire Guard grid assemblies (sold separately). Ceiling Tile, Ceiling Tile, Material Mineral Fiber, Series Clean Room, Length 24 In., Width 24 In., Noise Reduction Coefficient 0.55, Edge Type Square Lay-In, Grid Size 15/16 In., Color White, Thickness 5/8 In., Ceiling Attenuation Class 40, Light Reflectance 0.80, Resistant To Sag, Mold, Mildew, Bacteria, Soil, Fire Guard, Texture Smooth, Coverage 48 sq. ft., Temp. Range 32 Degrees to 120 Degrees F, Recycled Content 41 Percent, Application Clean Rooms, Labs, Kitchens and Surgical Areas