... steel welded tube Features:1) Sizes:OD(mm) 9.5, 12.7, 15.9, 17, 18, 19.1, 20, 21, 22.2 ... , 50.8, 60, 63.5, 63.5, 73, 76.2, 88.9, 101.6, 1142) Thickness(mm): 0.3 - 3.03) Length ... -20058) Polishing: 80#, 180#, 240#, 320#, 400#, more than 400#9) Application: construction,industrial instrument,automobile10)Inner packing: Plastic bag inner ...