⅛” holes, ¼” staggered centers, 23% open area

1⁄4″ holes, ½” staggered centers, 23% open area

⅜” holes, ½” staggered centers, 51% open area

3⁄16″ holes, 5⁄16″ staggered centers, 33% open area

⅜” holes, 9⁄16″ staggered centers, 40% open area