... 30x5, 32x5, 40x5, 50x5, 65x5, 75x6, 75x10---100x10mm etcI bar: 25x5x3, 30x5x3, 32x5x3, 40x5x3 etcUS standard: 1''x3/16'', ... Low carbon steel, etc 5Surface TreatmentBlack, self colour, hot dip galvanized, painted, spray coating (Mr. David Huang) 6Grating StylePlain / Smooth ... , Serrated /teeth, I bar, serrated I bar (Mr. David Huang) 7StandardChina: YB/T 4001.1- ...