steel section:U channels 1)Specification: ST37,ST52,ASTM A 36,SS 400 2)Size:30X15~400X110 steel sectionThe feature of U channels: 1)Specification: ST37,ST52,ASTM A 36,SS 4002)Size:30X15~400X1103)ApplicationConstruction,vehicle manufacture and other industrial structure.4)Treatment : Hot rolled ,Hot dip galvanised and painted5)we can supply any length as per your request.