Lowell grille Model LO-8P is molded from high-impact, polystyrene plastic. It features a flush trim ring with a round interior rim and honeycomb shaped center grille that provides a 60% open area for maximum sound transmission of an 8" loudspeaker. It is ideal for use in offices, hotels, schools, medical, retail, and commercial facilities where a plastic grille is preferred over a steel or aluminum material.