1)Supply square and rectangular tubes 2)O.D:6.0-519 ... From the nature, To the excellence NameSquare and rectangular tubesStandardASTM A554, A312, A249, A269 and A270Material ... Dull Finish)400G, 500G, 600G or 800G Mirror finishApplicationOrnamental tubes, Decoration construction, upholstery, industry instrumentsTestSquash test, Extended test ... Hardness (HV)<253<253<200<200 Rectangular tubes/pipes