0.375×0.625 Oblong on 0.5625 Staggered Centers 41% - 60%, Metal Perforation Patterns, Oblong, OPEN AREA, PATTERN, SHAPE, Staggered 0.375×0.625 Oblong on 0.5625 Staggered Centers 0.375″ x 0.625″ Oblong on 0.5625″ Staggered Centers 45% Open Area