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