drain grating 1. Material:steel 2.bearing bar pitch:30-90mm 3.cross bar pitch:50-100mm 4.Plain,Serrated, ... ,.....75x10mm2Bear bar pitch12.5, 15, 20, 23.85, 25, 30, 30.16, 30.3, 34.3, 35, 40,41,60mm. US standard: 1"x3 ... .154.550100522.711.1555010051.42.612.39650100622.517.35850100822.128.26