... From the nature, To the excellence NameSquare and rectangular tubesStandardASTM A554, A312, A249, A269 and A270Material Grade304,316,201,202, 316L, ... Brush, Dull Finish)400G, 500G, 600G or 800G Mirror finishApplicationOrnamental tubes, Decoration construction, upholstery, industry instrumentsTestSquash test, Extended test, Water pressure ... %≥35%≥35%Hardness (HV)<253<253<200<200 Rectangular tubes