4" OD 180 Deg. Mild Steel Mandrel U-Bend, 16 Gauge - 6" Radius, 6" Legs Item ID: 180MS16-400600-6X6 Wall (Universal): 0.065" (16 Gauge); Size (Universal): 4" OD on 6" Radius Material (Universal): 1010 Mild Steel Leg (Universal): 6"; Tube OD (Universal): 4"