... or Other2,Heavy RailSize: 38kg/m,43kg/m,50kg/mLength: 12-36m or Other Length Accord RequirementMaterial: 50Mn/U71MnStandard: GB ... QU100,QU120Size: 52.8kg/m, 63.69kg/m, 88.96kg/m, 118.1kg/mLength: Crane Railor Other Length Accord RequirementMaterial: U71MnStandard: ... (mm)Head width (mm)Middle thickness (mm)Length (m)Weight (kg/m)Standard865542575-108.42YB18908040107-1218.06YB24107925110.97-1224.46YB963. ...