... , AISI 4303) StandardASTM A554, ISO90004) Product rangea) Round and embossed tube O.D. (mm)9.5 , 12.7 , 15.9 , 17 ... .6 , 108 , 114 , 127 , 133 , 141 , 159 , 168, 219b)Square tube side length (mm)10*10 , 12*12 , 15*15 , 18 ... quality and competitive price Products Show : hairline finish stainless steel perforated sheet in grade 201 304