These exhaust bend kits include enough tubing to allow you to run your own exhaust system the way you want it. Each pipe is expanded on one end to allow easy installation. 4 X 48 Straight Pipes. 4 X 90 Degree Pipes. 4 X 45 Degree Pipes. 4 X 180 Degree U-Bends. 18 Gauge Wall Thickness. 304 Stainless Steel Construction. 4 X 20 90 Degree Bend. 4 X 18 45 Degree Bend. 4 X 30 180 U-Bend. 4 X 48 Straight Pipe. 3″ Depth Flared Slip Fit End (Deduct 3″ From Pipe Length when Joining Pipes). Approx 34.66 Ft total Piping Length when Joined. Professional Installation is Highly Recommended. Installation Instruction is NOT Included.