... serrated type bearing bar is 20 x 3 to 100 x 10,the specification of Isection type ... 7 x 4, etc.2) Bearing Bar Pitch (center to center):12.5, 15,25, 30, 30.16, ... 40, 60mm are recommended, 3) Cross Bar Pitch (center to center):38, 50, 76, 100, 101.6mm etc, ... recommended, America standard is available.4) Material:Mild Steel (Low Carbon Steel) or Stainless Steel5) Surface Treatment:Untreated, Painting or ...