... Standards for GratingMaterialsGalvanizing Standards ChinaYB/T 4001.1-2007GB 700-88GB/T13912-2002AmericaANSI/NAAMM(MBG531-00 ... 1''x3/16'', 1 1/4''x3/16'', 1 1/2''x3/16'', 1''x1/4'', 1 1/4''x1/4'', 1 1/2''x1/4'', 1''x1/8'', 1 1 ... .16, 30.3, 32.5, 34.3, 35, 38.1, 40, 41.25, 60, 80mm etcUS standard: 19 ... BS4592-1987, Australia: AS1657-1985,Germany: DIN24537-1-2006, Japan:JIS If you have any needs ...