0.875×0.875 Square on 1.125 Straight Centers 41% - 60%, Ellipse, Metal Perforation Patterns, OPEN AREA, PATTERN, SHAPE, Staggered 0.875×0.875 Square on 1.125 Straight Centers 0.875″ Ø on 1.0625″ 60° Staggered Centers 62% Open Area