Size
75 X 40 MM, 100 X 50 MM, 125 X 65 MM, 150 X 75 MM, 175 X 75 MM, 200 X 75 MM, 250 X 82 MM, 300 X 90 MM, 350 X 100 MM, 400 X 100 MM
Grade
MS, HT, IS2062 Grade A, St37-2, St52-3

Channel is represented by its Web height & Flange width of the channel.For e.g. 200x75 channel means, the Web height = 200mm & Flange width = 75mm.