1.000 on 1.250 Staggered Centers 41% - 60%, Metal Perforation Patterns, Oblong, OPEN AREA, PATTERN, SHAPE, Staggered 0.5625×1.500 Oblong on 0.875 Staggered Centers 0.5625″ x 1.500″ Oblong on 0.875″ Staggered Centers 47% Open Area