Ceiling Tile, Width 24 in, Length 24 in, 3/4 in Thickness, Mineral Fiber, PK 12/ OVERALL LENGTH: 24.00 INCHES NOMINAL OVERALL WIDTH: 24.00 INCHES NOMINAL JOINT STYLE: 13 BEVELED TONGUE AND GROOVED JOINT OVERALL THICKNESS: 0.750 INCHES NOMINAL NOISE REDUCTION COEFFICIENT RATING: 0.750 NOMINAL FLAMEPROOF FEATURE: NOT INCLUDED ENVIRONMENTAL ATTRIBUTE CODE: COMPOSITE PANELS - ACCOUSTICAL - BIOBASED SPECIAL FEATURES: SQUARE LAY-IN; 15/16 INCH GRID SIZE; FINE TEXTURE COLOR: WHITE MATERIAL: MINERAL FIBER FOAM