stainless steel welded tube safe, nice outlook, economical, environmental grade:200, 300 series ... tube/pipe 1. Grade: mainly common 200series, 300series 2.Technical: welded 3.Outer Diameter: 9.5~219mm 4.Advantage: safe, nice ... outlook, economical, environmental Company Image: Stainless Steel Welded Pipe: Features:STANDARDS: AISI,ASTM,DIN,JIS,GB,ENGRADE :201 ...