It is including light rails, heavy rails, crane rails and rail fittings. 1)Light rails: 9kg, 12kg, 15kg, 18kg, 22kg, 24kg, 30kg Steel grade: 55q / q235 Length: 6m~12m Executive standard: refer to gb11264-89¡ 2)Heavy rails: 38kg, 43kg, 50kg, 60kg Steel grade: u71mn / 50mn and so on Length: 12.5m Executive standard: refer to gb2585-81/qb 3)Crane rails: qu70, qu80, qu100, qu120 Steel grade: u71mn / u75v Cut length: 12m Executive standard: gb3426-82, yb/t 5055-93.