USG INTERIORS R2310 2-Feet by 4-Feet Radar Ceiling Tile 2' x 4' x 5/8" Radar, Ceiling Tile, Square Edge, Professional Series Medium-textured panels, that feature a unique, non-directional pattern Made with water-felting manufacturing process that provides excellent Ceiling Attenuation Class (CAC) performance Tiles install quickly and easily Panels have perforations that aids in sound absorption