This is the 18" extension pipe for the Camco RV Gen-turi Generator Exhaust System (item: 44461). It is recommended that the exhaust pipe extend a minimum of 6" above the roof line. While the Gen-turi system comes complete with 10' of pipe you may need a little extra if you have a taller RV, and this extension will allow you to reach the recommended height. It comes with a coupler as well allowing you to connect the pipes together easily. The extension is easy to install and allows the Gen-turi to vent nasty exhaust fumes away from the ground and above the RV's roof line. Item: 44872. To be used with the RV Gen-turi Generator Exhaust System - 44461. Weight - 1. 1 pounds This is an 18" extension pipe for the Gen-turi generator exhaust system. It is recommended that the exhaust pipe extend a minimum of 6" above the roof line. While the Gen-turi system comes complete with 10' of pipe you may need a little extra if you have a taller RV, and this extension will allow you to reach the recommended height. It comes with a coupler as well allowing you to connect the pipes together easily. The extension is easy to install and allows the Gen-turi to vent nasty exhaust fumes away from the ground and above the RV's roof line. 18" extension for Camco's Gen-Turi Generator Exhaust System 18" extension for Camco's Gen-Turi Generator Exhaust System Vent generator exhaust fumes above the RV's roof line For use on taller RVs Helps reduce generator noise