Armstrong Ceiling Tile,24 in L,24 in W,PK24 3152

30-Year Limited System Warranty Against Visible Sag, Durable Material Fiberglass Color White Standards ANSI/ASHRAE/USGBC/IES Standard 189, ASTM E1264 Classification Type IV, Form 2, Pattern E, ASTM E84, California Department of Public Health CDPH/EHLB/Standard Method Version 1.2, 2017, CAN/ULC S102, GREENGUARD Gold Certified Application Libraries Series Optima