... grating, heavy duty grating. ISO9001-2000,GRATING SPECIALIST galvanized industrial ball stanchions , steel handrail , Galvanized handrail ,GI grating, heavy duty ... 25, 60, 80mm etcUS standard: 19-w-4, 15-w-4, 11-w-4, 19-w-2, 15-w-2 etc. (Mr. David Huang) ... SS304, SS400, Mild steel & Low carbon steel, etc 5Surface TreatmentBlack, self colour, hot dip galvanized, painted, spray coating (Mr. David Huang ...