0.625 x 3.000 Rectangle on 2.500 Staggered 21% - 40%, Metal Perforation Patterns, OPEN AREA, PATTERN, Rectangle, SHAPE, Staggered 0.625 x 3.000 Rectangle on 2.500 Staggered 0.625″ x 3.000″ Rectangle on 2.500″ Staggered Centers 35% Open Area