3" Universal Aluminum Piping Kit.This kit includes: 3" Straight Pipe x2 3" 45 Degree Bend pipe x2 3" 75 Degree Bend pipe x2 3" 90 Degree Bend pipe x2 3" 180 Degree Bend U pipe x1 3" Straight Silicon Hose Coupler x6 3" 90 Degree Elbow Silicon Hose x2 3" Stainless Steel T-Bolt Clamp x16 These are High Quality 6061 Alumminum Alloy Pipes- Mandrel bend- Polished- Each pipe is 18" in length- Each pipe is bead, or rolled of each end- 2mm thick wall, better than other pipes.