1.Stainless steel grating 2.Metal grating 3.ASTM A123,SS400 4.Common pitch:30mm&40mm 5.Used in flooring,walkway No.ItemDescription1Bearing Bar25x3, 25x4 ... 4Material GradeASTM A36, A1011, A569, Q235, S275JR, SS304, Mild steel & Low carbon steel, etc5Surface TreatmentBlack, self colour, hot dip galvanized, painted, spray ... -1985, Japan:JIS China: YB/T 4001.1-2007, Stainleee steel grating