... for Decoration Purpose,OEM&ODM are available. A554 - Welded Stainless Steel Mechanical Tubing for Decoration Purpose Standard Specification: ASTM A554, ASME ... SA554 Steel Grade: MT304, MT 316L, Grade 201 (Ni: 1%), Grade ... Finish, #180+HL Finish, #240 Finish, #400 Finish, #600 Finish Outside Diameter: Round tube: 1/2"mm to 4" or 12 ...