1/4″ HOLES ON 5/16″ CENTERS STAGGER PATTERN 18 GA.-.048 THICK- CARBON STEEL PERFORATEDED SHEET 58% OPEN AREA 12″ x 12″ MADE IN THE U.S.A. SELLING QUALITY METAL PRODUCTS IN THE MID-WEST FOR OVER 60 YEARS CUSTOME SIZES WELCOME–MESSAGE FOR PRICING