PERFORATION PATTERN LIBRARY Round Hole Staggered Pitch Round Hole Square Pitch Square Hole Staggered Pitch Square Hole Square Grid Slotted Grid Hexagonal Pitch Designer Series Slotted Grid SL20 x 3.5 - 44 SL20 x 3.5 - 33 SL25.4 x 6.5 - 46 SL25.4 x 6.5 - 41 SL20 x 3.5 - 44 SL20 x 3.5 - 33 SL - B - 43 SL - C - 45 SL - D - 44 SQ14SG-49 SQ20SG-31 SQ20SG-42 SQ20SG-51 SQ35SG-29 SQ35SG-45 SQ50SG-31 SQ50SG-43 SL25.4 x 6.5 - 46 SL25.4 x 6.5 - 41 SL - A - 42