... 45# Cold-Drawn Steel 2.specification of cutter bar is 5x20,6x20,6x21,6x25. cutter bar for combine harvester : 1.35# and ... 45# Cold-Drawn Steel 2.specification of cutter bar is 5x20,6x20,6x21,6x25. cutter bar for combine harvester : 1.Products Discription ... : the material of the cutter bar is 35# and 45# Cold-Drawn Steel,the specification ...