Generally available in 6.100 to 6.400 Metre lengths (in 3, 5 & 6mm thick, 4.000 Metre lengths may also be available) and in Grade 43A, however in certain sizes other Grades such as 50B may also be available. For your information Kg/m refers to the Kilograms per Metre of the bar, as an example a 4.200 Metre length of 50 x 8mm Mild Steel Flat Bar (3.14 Kg/m) would weigh (4.2 x 3.14) 13.188 Kg's Total.