a.full range in type & dimension b.largest production capability c.reliable manufacturer (a ... -owned company) d.best price 1.comprehensive type and range in dimension. Flat bearing bar : all range 19X3,19X5, 20X3,20X4 ... , 101.6, 102,...... Material: Mild steel Q235 or other equivalent Grating Conformity Standard: YB/T4001, ANSI/NAAMM-MBG531, BS4592, AS1657, JS31012. 11 ...