1. stainless steel welded tube for stair rail,safety window, guard door etc. 2. Material: 201, 304, 316, 430, etc Stainless steel welded tubeDiameter: 6.35mm~219.08mmThickness: 0.40 to 5.0mmInch, GA sizes are availableSurface available: MF, 180grit, 240grit, 320grit, 400grit and 600gritGrade: 201, 202, 304, 316, 316L, 321, 409, 430Standard: GB/T12770; ASTM A554; JIS G3446; DIN EN10296- ...