1.Stainless Steel Grating 2.Certification:ISO9001:2000 3.ASTM A123,SS400 4.Common pitch:30mm&40mm Stainless Steel Grating No.ItemDescription1Bearing Bar25x3, 25x4, 25x4 ... , 20, 23.85, 25, 30, 30.16, 30.3, 32.5, 34.3, 35, 38.1, 40, 41.25, 60, 80mm ... GradeASTM A36, A1011, A569, Q235, S275JR, SS304, Mild steel & Low carbon steel, etc5Surface TreatmentBlack, self colour, hot dip galvanized, painted, spray ...