... Bearing Bar / Load Bar Specifications / mm:The specification of plain type and serrated type bearing bar is ... 20 x 3 to 100 x 10;the specification of I-section type is 25 x ... 80, 100 mm etc, also be according to client's requirement and 30, 40, 60mm are recommended,America standard ... 100, 101.6mm etc, also be according to client's requirement and 50, 100mm are recommended, America standard is available ...