Home Decor Foam Glue-up Ceiling Tile R31W (21.12 s/f/Case) Pack of 8 Plain White
Extruded polystyrene, a very light material that makes it easy to work with and maintain. One unpainted tile weights just 1 oz! Roughly 19.5 in x 19.5 in x 0.21 in (1 tile covers 2.64 sq. ft). Glue up ceiling tiles.