Size :From1/2inch to 10inch Wallthickness:0.2mm-10mm. Material : 301, ... ,304L,310S,316,316L,321,430 Grade :A / B Outer diameter :18mm-219mmWall thinkness:0.2mm-10mmMobile:0086-18920116609Features and specifications1) high ... -frequency welded2) outer diameter:18-2193) steel grade:301.304.304L.310S.316.316L ...