... .3kg/m, 24.46kg/m, 30.1kg/m Length: 6m,7m,8m,9m,10m , Material: Q235, 50Q, 55Q Standard: YB222-63, ... 63.69kg/m, 88.96kg/m, 118.8kg/m Length: 12m Material: U71Mn Standard: GB3426-824. Japan& Korea Standard Rail ... 2kg/m, 50.4kg/m, 73.3kg/m Length:10,12m Material:U71Mn Standard: KSB8106-80, JIS E 1101-935. ... Unit Weight: 63.69kg/m, 88.96kg.m Length: 12m Material: U71Mn Standard: GB3426-82 18kg steel rails