stainless steel pipes material:201 grade,304 grade application:decoration,decoration,etc. stainless steel pipesmaterial:stainless steel pipe 300series,200 seriesusage:making windows frames,door accessories,stair handles. 304 welded steel tubeStandard:AISI,ASTM,GB1.specification:a)round pipe:9.5mm-133mmb)square pipe:10*10mm-80*80mmc)rectangular pipe:20*10mm-95*45mm2.thickness:0.25—1.8mm3.length:5. ...