the circular design of the stratus plastic perforated panel creates a stylish, modern look in your ceiling t-grid system. It has a consistent smooth white finish and is shipped with removable plastic film that keeps the panels clean for installation. It fits perfectly into a 2′ x 2′ grid system and can be easily removed to scrub clean if necessary. The panel will never rust or need painting, won’t fade or yellow and won’t chip. It’s mildew resistant, anti-static, and resists sweating which reduces dust buildup. Holes are 1/4″ diameter. Package of 5. Also available in 3/8″ and 1/2″ diameters. features white overall size 23 ” x 23 “, thickness 1/16” holes staggered 60 degrees pitch 9.5 mm 39% open area flame resistant, meets ul 94hb flame spread test