... :1.Light Rail Specification: 4kg/m, 6kg/m 8kg/m,9kg/m, 12kg/m, 15kg/m, 18kg/m, 22kg/m ,24kg/m, 30kg/m 2.Standard: GB, GB11264-89Grade: Q235,55QRail Height ... mine railway, you can choose light rail size:9kg/m,12kg/m,22kg/m,30kg/mIf you use it in passenger and freight ... transportation railway, you can choose Heavy Rail 38kg/m,43kg/m,50kg/mIf you use it in hoist or crane, you ...