2.5 Inch Universal Aluminum Piping Kit 2U Shape 2.0mm Thickness Aluminum Pipe, Mandrel Bent, Polished. Each Pipe is 18" in Length,Outer Diameter is 2.5".Each pipe is bead, or rolled of each end(Except J Pipes). Top Quality Silicon Hoses,inside Diameter is 2.5". Matching Top Quality Stainless Steel 2.5" T-BOLT Clamps.