The Detail of Rolled Steel Belt No. Width Thinkness Unit/MM Unit/MM 1 60-350 1.2-1.6 2 60-350 1.0 3 60-350 0.9 4 60-350 0.8 5 60-350 0.7 6 60-350 0.6 7 60-350 0.5 8 60-350 0.4