Mark & model : f21.3mm~f3000mm material: a105, st37.2, s235, a350lf2, c22.8, s400, sq235, a694, 304, 304l, 316, 316l etc. Origin : asia and pacific area china Quality standard : international H.S.Classification : metal articles articles of iron or steel 7307 tube or pipe fittings, of iron or steel
