Sheet Metal Saddle Flue; Item Saddle Flue; Type Spiral, Riveted, 90 Degree, Uncrimped Branch; Size 14 Inch Diameter x 18 Inch Length x 6 Inch Depth; Material Thickness 26 Gauge; Material ASTM A653 Galvanized Steel; Used On Item 16 to 18 Inch Sheet Metal Pipe