... -40mm 4.outere diameter:6mm-830m Stainless steel pipesteel pipe, steel tubethickness:1mm-40mmoutere diameter:6mm-830mm200 Series, ... 300 Series, 400 Series, etc.seamless stainless steel pipe stainless steel pipe & tubes cold drawn and cold rolledSeamless stainless steel ... trades of petroleum, smelting, food, water conservancy, electric power, chemical industry, chemical fiber and medical machinery etc.